This is a set of 8 Baby Park sponge blocks. They are made of firm sponge. The set being offered is 2 blocks each of 4 colors, but if you have more, you can combine colors, quantities, and actions for activities such as "collect 3 yellow blocks," "line up 5 blue blocks horizontally," or "stack 4 red blocks." This set is also recommended as an addition for those who already own some. Each block is approximately 4cm x 4cm in size. These are new and unused, but have been stored at home, so we ask for your understanding before purchasing. As the box size is tight, they will be shipped in a waterproof bag, not bubble wrap. Another set is also available. We welcome combined purchases!! TOEZ Baby Park - Colors: Blue, Green, Yellow, Pink - Material: Sponge - Shape: Block - Use: Educational Toy Thank you for looking.