Made for the curious
Small
experiments.
Big curiosity.
Hi, I’m Robin. I make interactive explorations of mathematics, cryptography, and the web. A few ideas to click, question, and play with.
Find something to exploreThe collection / 01–05
Less scrolling.
More exploring.
No instructions required.
Pick an idea and follow it somewhere.
Cryptography · Interactive
Substitution cipher
Make a secret alphabet. Then turn detective and piece the message back together.
Crack the codeProbability · Interactive
Central limit theorem
A little randomness. A surprising pattern. Watch a bell curve emerge, one sample at a time.
Play with probabilityCryptography · Interactive
Vigenère cipher
One keyword. Many alphabets. Follow every letter through a classic cipher.
Find the keyCryptography · Interactive
Enigma machine
Turn the rotors and follow a signal through a machine that never sits still.
Turn the rotorsMathematical logic · Interactive
Löwenheim–Skolem
How small can an infinite universe be? Explore a wonderfully strange idea.
Think a little bigger