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Free STEM tools & games for kids
Turn a name into binary, crack secret codes, compare gravity across worlds, explore fractions and multiplication, practise telling time and more. Pick a tool and start experimenting, nothing to install.
Start exploring
Four favourites for curious kids, families and classrooms.
Fraction visualizer
See any fraction as a pie and a bar and watch it turn into a percentage and a decimal.
Try this toolName in binary generator
Type any name and watch it turn into binary code and then make it into a colorful bead bracelet.
Try this toolPattern maker
Pick shapes, colors, letters or pictures, complete the repeating pattern, then print a worksheet to continue by hand.
Try this toolWhat do you weigh on other planets?
Type your weight and see what the scale would read on nine worlds, and how high you could jump on each one.
Try this toolBrowse by topic
Math & logic
Make numbers visible, solve a classic puzzle and practise useful skills.
Play Tower of Hanoi Online
Move the whole stack to the last peg in as few moves as you can. Test yourself in this classic puzzle of logic and patience.
Try this toolFraction visualizer
See any fraction as a pie and a bar and watch it turn into a percentage and a decimal.
Try this toolMultiplication visualizer
Build, flip and split multiplication facts, then practise the small set that still needs attention.
Try this toolFind Your Birthday in Pi: Million-Digit Search Tool
Type a birthday and discover whether, and where, those digits appear in the first million decimal places of π.
Try this toolLearn to tell the time
Drag the hands of an interactive clock and watch it read the time back to you. A playful way to learn to tell time on an analog clock.
Try this toolNumber system converter
Type any number and see how seven civilisations would have written it, from tally marks and hieroglyphs to binary.
Try this toolScience & space
Experiment with colour and compare gravity across planets, moons and other worlds.
Codes & communication
Write secret messages and discover how computers and telegraphs communicate.
Name in binary generator
Type any name and watch it turn into binary code and then make it into a colorful bead bracelet.
Try this toolCaesar cipher maker
Scramble a message by shifting the alphabet and then dare a friend to crack it.
Try this toolMorse code translator
Turn any message into dots and dashes! Press play to hear it beep out loud and flash, just like a real telegraph.
Try this toolGuess my number in 7 questions
Think of a number from 1 to 100 and this will find it in seven questions, then let you try the same trick on it.
Try this toolCreate & explore
Follow patterns, mix colours or let chance choose the next hands-on activity.
For parents
A practical personalised guide for the early months of development.