So I got him to solder on an ISP header and start drawing patterns on grids of graph ... There’s absolutely no simpler way to get your head around binary than to light up a row of LEDs, and ...

draw a 14 by 11 square grid on each poster board. The rows and columns will both be two inches wide (the width of your stickies). Tape the two poster boards together along the 28-inch sides so that ...