KEVA Maple: 400 Plank Set

Each "Contraptions" set includes planks, an idea book and 2 bouncy KEVA balls (roughly the weight and shape of ping pong balls) to roll down paths, drop down shafts, and deflect around U-turns that you build.Think movement: marble runs, aqueducts, and roller coasters.The "Structures" sets are intended more for static architectural design - build bridges, monuments, towers and more."Structures" sets include planks and idea books, but no rubber balls.It's all about balance and stability with any set you choose - no glue, no connectors - just a steady hand, patience, and a vivid imagination!