Cogwheel game

A set of interlocking gears that turns a simple twist into a small chain reaction. Seven wooden cogwheels, each a different size and pattern, from a bold black-and-white spiral to a dotted orange wheel, fit onto pegs on a shared board so their teeth mesh with their neighbors, and turning the one wheel with a handle sets the entire chain spinning together at once. Watching one twist of the wrist ripple outward through six other gears makes the usually invisible mechanics of machines suddenly visible and touchable, a concrete first encounter with how gears transfer motion. Removing and rearranging the wheels changes which ones connect and which spin freely, so there's real experimentation beyond just watching the reaction repeat. The bold patterns create a blurred, colorful spinning effect once the gears get going, its own small reward for turning the crank. Sturdy pieces hold up to enthusiastic cranking. A hands-on introduction to mechanics for ages 3 and up.