Rainbow Sound Blocks SOUNDS - Transparent Blocks are hollow and filled with Beads that Produce Different tones FEATURES - Red, Yellow, Blue, Green, Purple and Natural wood Color Toy PLAY - Enclosed Box that Opens and Closes at the Top. All Six Shapes Easily Slide into the Enclosed Box. AWARDS - Winner of the Silver Practical Pre-School Award in 2006, and National Parenting Publications Award in 2001 CHILD SAFETY - Environmentally Friendly Rubberwood & Strictly Using Non-Toxic Paints, Dyes & Lacquers & Formaldehyde Free Glue Made from rubber wood and strictly using non-toxic paints, dyes and lacquers Blocks are hollow and filled with beads that produce different tones Red, yellow, blue, green, purple and natural wood colors Sound producing transparent colored blocks filled with beads Winner of the Silver Practical Pre-School Award in 2006, and National Parenting Publications Award in 2001 Made from formaldehyde free glue while the packaging is made from at least 70% recycled paper