Learning that's right on track! Young thinkers can design unbelievable ball track structures via simple, stacking planks. No glue, no connectors-just loads of constructive fun! Get things rolling by constructing the "Shooting Gallery," "Turbine," "Step Curve" and more! Within every one of us lies a creative spark, whether it motivates us to write, draw, sing, sculpt, or build. If your child enjoys building with blocks - then take his or her creative spark to the next level with the MindWare KEVA Contraptions 50 Plank Set. Try the Keva Plank Set out on a rainy day, or as a family activity, and see what your family. Structures that guide a ping-pong ball through a track composed of Keva Planks. Experiment how changing the track makes the ball move differently - beginner physics! Length: 13.25 High Quality Proprietary design Exceptional performance