Motorboat Book

There's more than one way to power a toy boat. Electric motors, balloons, gears, water jets, belt drives, chemical reactions, steam, and even gravity can be used to propel a small ship across a pool. Also, the boats' propellers and paddles can be side-mounted or at the stern, or even sit above the waterline, like a fan-powered swamp boat. The Motorboat Book will show children how to build more tha...