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Each Edge Peach Pear Plum

I've made another baby, so it's time for another talk about baby maths. Each Peach Pear Plum is a classic picture book for babies, with a beautifully simple rhyming scheme. But I've always wished it was more complete. Join me for an Eulerian tour through fantasy land!

Baked sudoku

You can impose on Sudoku puzzles a physical system which works surprisingly well. It has phase transitions, and when you reduce the heat it settles into a solved state!

Zeckendorf cup arithmetic

My 5-minute talk at the big MathsJam conference this weekend was about some stacking cups that my daughter is too young to appreciate. Here’s the really quick version, in just over a minute: …