Children can use the Archimedes blocks to build whatever they can imagine. The unique hole design creates an attractive display piece to keep in your home. The holes create a dazzling light effect when placed over a bulb. The blocks also have special ridges to assist your child in their incredible creations. Archimedes blocks are made from renewable materials such as bamboo, recycled plastic, and natural resin, suitable for children over 3. Collect all the color palettes to complete the collection. Features The blocks also have special ridges to assist your child in their incredible creations. Archimedes blocks are made from renewable materials such as bamboo, recycled plastic, and natural resin, suitable for children over 3. Collect all the color palettes to complete the collection.