Young architects can build and engineer many delightful towers with these colorful building blocks. The varying features, shapes and designs stimulate creativity and are perfect for little explorers. Contents include 21 Uniquely shaped wooden blocks treated with a non-toxic water based stain. Cube dimensions: 1 3/4" x 1 3/4" x 1 3/4". Packaged in a closed box. HABA's Mod Blocks make a great compliment to all other block sets from HABA. Suitable for ages 18 months and up.