Plus-Plus is a new kind of construction toy. It's one simple shape contains endless possibilities - assemble them flat to create a 2-D mosaic or work in 3-D to make more intricate builds. Even curves are possible thanks to the unique design of this deceptively simple shape! The BIG size is perfect for smaller hands or bigger ideas. This 15 piece tube set contains Basic Red, Basic White, and Basic Green. Designed and made in Denmark. BPA-free and phthalate-free. Suggested for ages 5-12. Each piece measures .75" x .5" (20mm x 12mm).