Learning that’s right on track! Young thinkers can build unbelievable ball track structures with this simple stacking plank system. Create ramps, funnels, chutes and crazy contraptions like the “Black Hole” or the “Bounce Plate”. No glue, no connectors - just loads of constructive fun! Includes 200 identical wooden planks, 2 specially designed light weight balls for maximum action and an 18 page idea book with project photos and quick start instructions.