Our modules are lightweight and easy to carry and assemble, and quick to tidy away. Blocmodule kits are made from high density foam covered with vinyl fabric and are perfectly safe. Children feel totally at ease exercising with them. They are made of high density foam, which is soft, but firm enough to withstand the weight of several children. Easy to clean and disinfect with soapy water. Dimensions: 24"" x 24"" - H 3"" to 12"".