This unique set of eight Twist-and-Turn Blocks by Hape screw-together so towers won't come crashing down. Colorful shapes accented with subtle patterns encourage imagination as toddler improves fine motor skills by screwing the pieces together. This set can be easily incorporated into other block sets for added fun. Wood for this toy comes from an FSC-managed forest accented with water-based paint and is made to meet the strictest of safety standards. Hape toys are designed to enhance developmental skills and are intended to last generations.