These 7 nesting Beechwood rectangles are stained in safety compliant colors which enable children to see all the rainbow colors with the natural grain of the wood. Tested for children aged 12m+, these Rainbow Architect Rectangles will inspire confidence and creativity as kids practice hand-eye coordination, color and shape recognition and role play! Plus the rectangles can assist with early STEM skills including construction, spatial reasoning, patterning and sequencing. Colors are red, orange, yellow, green, blue, indigo and purple. Size: 4.5"-8.7"L x 1.6"D.