Quadrilla Marble Run

Marbles drop to new levels, swirl in a funnel, and race to the bottom in different directions. Connect colorful wood blocks, tracks, and accessory pieces to construct endless configurations. 34 blocks, 10 pieces of track, and 50 marbles. Children learn about gravity, speed, inertia, and other principles of mechanics and physics. Average block size 13/4"l x 13/4"w x 21/2"h. (Age 4+)