Stimulate creativity and imagination with 280 smoothly sanded pine wood planks. No glue, nails, screws, or buttons are needed. Kapla Stacks are not interlocking. Each Kapla plank is simply stacked on top of the other and stays in place solely through gravity and balance. The flat shape and light weight of the wood promote confidence, curiosity, and determination. Part of the fun is removing one plank after another until the whole stack crashes to the ground. Each box includes a guidebook that describes techniques and models. Ideal for individual or group play and projects.