มาร์เบิลโรลเลอร์โคสเตอร์

The battery-powered Ferris wheel is the star here—watching it lift marble after marble to the top never gets old, even for me. We've already reconfigured the tracks into a loop-de-loop and the towers hold up surprisingly well to enthusiastic crashes.

My kids and I built the figure eight in an afternoon, and it's been running nonstop since. The motor on the Ferris wheel is strong enough that even the tower drops feed the marbles back up the track.

The battery-powered Ferris wheel is the star—watching it lift marbles up before they spiral down the figure-eight tracks never gets old. Setup took a little patience, but once those towers click in place, the whole thing runs smoothly for hours.