This 15 piece tube set contains Basic Red, Basic White, and Basic Green. 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! Precision crafted in Denmark, all Plus-Plus sets are compatible with each other. The BIG size is perfect for smaller hands or bigger ideas. Designed and made in Denmark. BPA-free and phthalate-free. Suggested for ages 5-12. Each piece measures .75" x .5" (20mm x 12mm).