Ralph Masiello's Robot Drawing Book Ralph Masiello. Charlesbridge, $16.95 (32p) ISBN 978-1-57091-535-2; $7.95 paper ISBN 978-1-57091-536-9 ...

The robot’s basic design is inspired by the Plotclock, which uses a similar setup to draw the time. We’ve seen other tic-tac-toe ‘bots before, as well as some clever electronic ...

It’s a simple machine, mechanically speaking — a small hexagonal robot that sticks to a normal classroom whiteboard and holds a marker that it can scoot around the board and draw with.