Rainbow Blocks are a great way to bring out the spatial intelligence in your child. The Rainbow Blocks toy provides a vivid and exciting way for children to learn and play with blocks at the same time. Made of smooth hardwood, the Rainbow Blocks feature transparent windows of strong plexi-glass in beautiful red, yellow, blue and green and are sized to complement classic block sets. This toy adds fun, beauty and dimension to your child's block building. Watch your child's enjoyment expand as they discover the principals of light and color with these amazing blocks.