This BIG 400 piece set contains Basic Colors, including Red, Blue, Green, Yellow, Orange, Purple and more. Plus-Plus is a new kind of construction toy. It's one simple shape produces endless possibilities - assemble them flat to create a 2-D mosaic or work in 3-D to make more complicated structures. Even curves are possible thanks to the unique design of this deceptively simple shape! This BIG size is especially well-suited for preschools and other early learning environments.