MindWare KEVA Contraptions 400 Plank Set TOYS THAT TEACH: Creating contraptions with KEVA planks is not only fun, but educational. Builders gain first-hand experience with balance, leverage, geometry and the principles of physics every time they design, stack, adjust and construct. INDIVIDUAL OR GROUP PLAY: KEVA planks is a fantastic activity for individuals and groups alike. This set can be used at home and in the classroom. Its the ideal activity to help kids gain an understanding of balance and proportion, as well as an interest in architecture, building and design. NO HASSLE: With no glue or connectors needed, our KEVA Contraptions 400 set is ready to play right out of the box. Forget the hassle of having to round up a laundry list of non-included tools. Simply unpack and build! ENDLESS POSSIBILITES: Build an entire city or an enormous sky scraper, create castles complete with stairs and turrets and more. Your imagination is the only limit to what can be created with KEVA planks. INCLUDES: 400 KEVA planks, zippered canvas storage bag, 2 KEVA balls and an 18 page full-color idea booklet with build-out instructions. (Ages 7 and up)