So you're getting better at coding? We've got some challenges for you.
So you're getting better at coding. Maybe you've earned some CoderDojo Stirling badges. Now try some of our challenges below!
Start completing challenges today:
Scratch: To the moon
Website: My favourite game
Scratch is a nice programming language for learning how to code. If you haven't used Scratch before, you can do our Scratch badges to get started. If you have used Scratch before, pick a challenge below and do it!
Make a theatre stage with a band on it: a drummer, a guitarist, a singer, and anyone else you want. When you click on a person (or their instrument), the instrument sound should play. So when you click on the drums, you hear drums!
More advanced: Try clicking your band members at the right time, so it sounds like a proper song!
Make a story about a bear searching for his dinner. The bear should move around, and tell the following joke to a frog:
Create a maze game. If you collide with a wall, you get teleported to the start, and told “you clumsy oaf”!
Make an animation of your name, so each letter does something cool like make a sound, or move around or change colour. I’m called GREG, so the G might spin around, the R might change from red to blue, and so on. The animation should start when the Green Flag is clicked.
More advanced: Make the animation cooler. You could make the background change, or make a bird fly around, or make the letters do things when you click on them.
Create a game where the player gets points when the cat catches a mouse, and loses points when the cat steps in a dog-poo.
More advanced: can you make this game two-player?
Build an aquarium with fish swimming around and plants at the bottom. The fish should turn round when they hit the aquarium edge.
More advanced: Add a shark into the aquarium that is controlled with the arrow keys. Make the fish run away when they bump into the shark.
Make a game about a space miner:
Make a Hide and Seek game with the Scratch Cat: the Cat will appear somewhere on the screen, then vanish after 2 seconds. 6 seconds later, the Cat will appear somewhere else on the screen, then vanish again after 2 seconds. It does this forever. The player gets one point when they click on the cat, and lose a point if they click on the background.
Make a game about escaping a graveyard. You start at one side of the graveyard, and have to escape through a gate on the other side. The graveyard has grave-stones in the ground, and ghosts that move around. If you collide with a grave-stone or a ghost, you get teleported to the start.
More advanced: Make the graveyard more spooky. What about making an invisible ghost appear when the player hits a gravestone? Maybe it says “boo!” (record the sound effect)
Make a game about someone doing a parachute jump, and having to dodge moving clouds. If they hit a cloud, they lose the game.
More advanced: make things harder, with more clouds moving randomly at different speeds. You could also keep score by counting how many clouds the parachutist dodged. Or make things look cooler by changing the background: what about thunder and lightning, or snow?
Make a quiz where the player has to multiply random numbers together. "What's 2 times 7?". "14". "Correct!".
More advanced: make the quiz ask 10 questions, and keep a score of correct answers. And do more fun stuff when the player gives a right answer (yay!) or wrong answer (boo!).
Make a scene with a windmill (or wind turbine) and a cloud. Make the windmill turn and the cloud move across the sky. Now here's the fun bit: make the windmill turn faster the louder you whistle (or yell) into your computer's microphone. The cloud should move faster too. The louder you whistle, the stronger the wind!
Make a game that measures your reaction time: how fast you can click when Scratch cat changes from his normal orange colour to blue. At the end of the game, show your reaction time (it will be in milliseconds, which is a second divided into 1000 parts). What's the fastest you can click?
Make a Scratch program that generates random insults :-) Scratch cat first asks for your name, then insults you. Here goes..
Write a game about flying to the moon. There should be three stages in your game: one set on Earth; one in space and one on the moon.
To start the rocket the player should press the space bar five times. Then the rocket should fly into the air. When the rocket reaches the top of the screen, the background should be changed to the next background (e.g. from Earth to space). Along with placing the rocket at the bottom of the screen again. The player should be able to move the rocket left and right using the arrow keys. There should be Aliens and other space-ships flying around. If the player touches one of these they lose the game. When the player reaches the last stage (the moon) a target should appear. The target should be placed at the top of the screen. If the player hits the target then they win the game.
For a spaceship sprite look in the sprite library (they'll be found in flying).
To count the number of times the player has pressed space make a variable (found under data). Then every time space is pressed add one to this variable. Use the wait until block to make the sure the rocket doesn't fly off until the variable equals five. Ask a mentor for help if you haven't used variables before.
To change the background check whether the y coordinate is bigger than 180, then use the switch background block.
If you manage to complete the above try and place the target at the bottom of the screen. Then have the rocket start at the top and move down the screen (towards the target).
If you’ve never built a website before, do our badge called Get your own website on the Internet. If you have built a website before, pick a challenge below and do it!
Create a website about the solar system. It will need a start page describing the solar system, and a page about every planet. You could even do pages about different space missions involving astronauts.
Create a website about the place where you live. Let’s say you live in Stirling. Where is it? How old is it? What would you show someone who came to visit? What interesting things can you do there?
What do you want for Christmas? Let Santa (and mum, dad, gran and anyone else) know with your own website.
Your website should have descriptions and pictures of the items you want and links to where they can be bought. You could prioritise the items with a star rating to say how much you want that item, or organise it by price so everyone can find the right gift for you!
More advanced: Add some Christmas style and Christmas tunes to get everyone in the present-buying mood!
Chemistry, computing, psychology, microbiology, astronomy…. how many types of science can you think of?
Make a guide to science: your website should have one page for each type of science. Explain what it is. Include pictures of famous scientists or discoveries, and links to other websites so that your readers can find out more.
Make a website game about a haunted house. Each webpage is a room in the house, and describes the spookiness happening in the room. The links on a room’s webpage take the player to other rooms nearby.
The player starts outside the haunted house (on the website’s main page). They then choose which links to follow to take them though the haunted house, and out the back door!
So you watched the Olympics? There were loads of cool sports: swimming, triathlon, fencing, …
Make a website about the Olympics. You can have pages about different sports and athletes. Maybe a page about Rio de Janeiro in Brazil. Include pictures and videos (try including a youtube video). Link to other websites where your readers can find out more.
Make a webpage with lots of animal pictures. When you click on a picture ("sheep"), an alert box should pop up with the animal noise ("baa").
Make a website for Bob's Bakery.
"My name's Bob, and I run Bob's Bakery. We make lots of cakes and tasty things: chocolate cake, gingerbread men, jam doughnuts, ring doughnuts, strawberry tarts, and lots more. I'd like to start selling my cakes on the internet, so will need a website. I reckon it needs:
I bet you've got a few favourite films. So make a website about them! You will need:
Make a website for Bob the Builder.
"I'm Bob the Builder. I build houses: houses for people, dog-houses, dolls-houses, tree-houses.. If it's a house, I can build it. I want a website so people can find me on the Internet, see what I do, and contact me if they're interested. Hopefully I'll get some new customers! I reckon the website needs:
My favourite game. Write a small website about your favourite game(s). The website should contains:
A short of description of the game. What's about it? What are the goals of the game? How long does it take to complete? Is there a story? Who's it developed by? And any other relevant.
A link to the game site
Images and videos of gameplay
Here are two online environments where you can start coding immediately (or use whatever setup you want):
Write a program that asks someone their name, then outputs it in reverse. So “GREG” becomes “GERG”.
Write a program that asks for a country name, then outputs the capital city. So “France” returns “Paris”.
Write a program that plays ‘rock paper scissors’:
Write a program that plays ‘hangman’. The player guesses letters to complete a secret word. You decide how many turns they get. On each turn:
Write a program that counts the number of words in a sentence. For example, for “i am an example sentence”, the program would print 5 (words).
Then improve your sentence analyser:
Write a calculator that can add, subtract, multiply or divide two numbers. Make the calculator accept the two numbers and command one line at a time. Like:
More advanced: make the calculator accept everything on one line, like: 2 + 3.
Write a program that prints the numbers from 1 to 100. But for multiples of three print "Fizz" instead of the number and for the multiples of five print "Buzz". For numbers which are multiples of both three and five print “FizzBuzz".
Write a program that prints out the first 100 numbers in the Fibonacci sequence. In the Fibonacci sequence the first two numbers are zero and one. Every number after that is the sum of the previous 2 numbers. So the first seven numbers are: 0 1 1 2 3 5 8.
Write a program that turns a sentence into a secret message by replacing each letter with the next letter. So the letter ‘a’ is replaced by ‘b’, and ‘f’ by ‘g’, etc. Here’s an example:
Hint: letters are represented inside a computer as numbers. This is called ASCII: so an ‘a’ in ASCII is 97. You’ll need to convert the sentence letters into ASCII, do some addition, then convert them back again. Google to learn about ASCII, and how you convert letters to ASCII (and back again) in your particular programming language.
More advanced: so you’ve written a program that ‘encrypts’ a sentence into a secret message. Write a ‘decrypt’ program that turns a secret message back into the original sentence.
Write a program that outputs whether two phrases are anagrams of one another. For example:
Write a program that outputs whether a given number is a factorial (or not).
A factorial of a particular number is that number multiplied by all numbers below it. So 5! (meaning 5 factorial) = 5 * 4 * 3 * 2 * 1 = 120.
Calculating 5! is easy. But we want to reverse this. Write a program that tells us that "120" is "5!". The program should work for any number, either reporting that that the number is a factorial, or "NONE" if it isn't. For example:
Write a program that lets you create and manage a 'to-do list'. You should be able to: add an item, delete an item, and view the whole list (of items). Here's my example to-do list:
Write a game that measures your reaction time: how fast you hit the space-bar when told 'hit it!'. At the end of the game, show your reaction time in milliseconds (a second divided into 1000 parts). What's your fastest reaction time?
Make a program that generates random insults :-) The program first asks for your name, then insults you. Here goes..
Write a small program that takes in a number and then prints off a triangle of that height. Here is an example:
Please enter the height of the triangle: 5 Output: # ## ### #### #####
The program should only accept whole numbers between 3 and 10.
Once you've finished the basic version, try and produce the following output:
Please enter the height of the triangle: 5 Output: ## #### ###### ######## ##########
At Stirling CoderDojo, we have micro:bits to play with. Ask a mentor if you would like to use one. A micro:bit is a cool little computer with LEDs, a compass, motion detection and temperature detection. So you can make it to do cool stuff like show the temperature when you shake it! There’s a web-based Block Editor (like Scratch) for writing and testing code. When you’re happy with the code, you need to transfer the code to the micro:bit. To do this: