This set of translucent building pieces can be used to stack and fit together to create multi-colored pyramids. Finished pieces would look magnificent illuminated from below while atop a light pad. Playing with these pieces, shapes and colors will help children to develop sensory play. Details: Includes assorted pieces 13.58" x 9.06" package dimensions 25 pieces STEM learning Includes 4 transparent activity sheets Great for light tables and light pads For ages 3 through 6