Kullerbu Traffic Jam Ball Track Set

Get ready for fast-moving, stop-and-go fun with this colorful wooden ball track built for curious young engineers. Kids can send three chunky balls racing down ramps, through the hopper, across the swinging track, and into a dramatic domino traffic jam—all while experimenting with speed, gravity, cause and effect, and track design. With 33 interchangeable pieces and endless ways to rebuild the course, this expandable system keeps play fresh as problem-solving and construction skills grow.