Roller Coaster Kelereng | KiwiCo

My kids spent a whole rainy afternoon building the figure eight track, and the way the marble actually loops around without flying off is seriously satisfying. The Ferris wheel lift mechanism is sturdy enough that even my four-year-old can crank it without knocking everything down.

The battery-powered Ferris wheel is the standout piece — watching it lift marbles and drop them into the figure-eight tracks is genuinely mesmerizing. I set it up on the dining table and we kept tweaking the towers for over an hour.

My kids spent a whole rainy afternoon building the figure eight layout, and the marble drops actually looped cleanly every time. The towers click together snugly enough that we didn't need to reinforce anything, which surprised me.