Age 4+ Build and topple creative structures! The unique design lets children stack and interlock the beautifully coloured blocks in a range of interesting and challenging ways. See how high you can build before knocking down your tower and watching the blocks spring and bounce. Made from recycled plastic. Check out our instructional video. Includes: 24 Spring blocks, 1 x 2½”(2.5 x 6.25 cm).