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! Precision crafted in Denmark, all Plus-Plus sets are compatible with each other. This 100 piece basic pack comes with mix of blue, green, red, yellow, purple, orange, brown, grey, white and black bricks. Safe for ages 3 and up, and endless fun for a broad range of ages. Designed and Manufactured in Denmark.