Plus-Plus is a unique construction toy. Its one simple shape, which looks like a double plus sign, contains endless possibilities. Assemble pieces flat to create a 2D design, or build 3D structures. Even curves are possible. Precision crafted in Denmark, Plus-Plus sets are compatible with each other. Tube features 70 pieces in assorted primary colors, each piece measures approximately 3/4" by 1/2". BPA-free and phthalate-free. Comes with an idea guide. For ages 5 and up.