HABA Kaleidoscopic Building Blocks - 13 Piece Set with Colored Prisms (Made in Germany) Add a colorful dimension of light and fun to any building and stacking activity with this innovative set of blocks. Includes 13 wooden cubes, each measuring 1.5" x 1.5". prism lens colors include: 2 red, 2 orange, 2 green, 2 turquoise, 2 clear, 2 blue and 1 haba natural block. Suitable for ages 1 and up, this set is great on its own and also makes a perfect compliment to any of the HABA building blocks sets Children can experiment with color by looking through different colored blocks in side by side comparisons. Blocks can be combined to try to find new colors in the spectrum. For HABA responsibility is written in capital letters. Made of natural, untreated beech wood that comes from sustainable forestry in Germany.