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In this hands-on engineering project, kids use two simple machines, levers and inclined planes, to construct their own pinball machines.

Using paper, paper clips, an index card, and tape, teams of learners design flying devices to (1) stay in the air as long as possible and (2) land as close as possible to a given target.

In this online Flash game, learners test their engineering know-how, moving a collection of mechanical parts onto a board to make complete a system of parts that will move a ball from start to finish.

Learners create an electrical-circuit maze out of wire, then try to pass a paperclip through the maze without touching the wire.