Little builders boost their imaginative and engineering skills with MathLink Cubes Big Builders, a STEM-inspired building set powered our bestselling MathLink Cubes! This deluxe building set comes with 200 cubes cast in 10 bright colors from red and blue to black, white, and brown. Following along with the included activity guide, kids can tackle more than a dozen building challenges - build your own puppy pal, create a vroom-ready motorcycle, or transform cubes into a whooshing rocketship - or make their own creations. Each sturdy cube measures 0.75"L x 0.75"H, and can be snapped together or apart over and over again. Ages 5-9.