This set of 100 math connecting cubes includes 10 different colors. Cubes link together on all sides and feature five different geometric shapes on five of the sides: circle, square, triangle, pentagon and hexagon. These counting blocks are an ideal STEAM resource for every home or classroom learning environment. They connect with an easy, soft click, making them appropriate for children aged 3+. The set of 100 numberblocks comes with an Activity Guide, which provides inspiration and ideas for using the cubes as an early math manipulative. Perform problem solving and reasoning tasks by color only or by shape and color for more advanced/older users. || Size: 0.75" sides.