Archive | December, 2018

30 December 2018

Circular Os and Xs

On a ferry journey, Jude wanted a pen and paper game that we didn't already know how to play, so she invented a variant on naughts and crosses ('tic-tac-toe'). You play it on this board: You still have to get three of your marks in a row, but there are more ways for this to […]

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04 December 2018

Studying a Hallowe'en LED flasher

A friend kindly gave us some flashing-light stickers for Hallowe'en, and the natural thing to do with them once the festivities were over was to dissect them. So we did this, and found that each contained a square circuit board about 25mm on a side. When you press a little button in the middle, three […]

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