HABA Clever Up! Building Block System 4.0Welcome to HABAs Clever Up! Building Systema world of endless possibilities. With a mix of cubes, rectangular blocks, panels, strips, balls, and triangular prisms, your child can design and construct creations that are as imaginative as they are educational. Build bridges, create inclines, and discover how shapes interact. The Clever Up! system even introduces simple digital thinking concepts, opening the door to a universe of learning and play. Why