This set includes natural beechwood keys in 11 different shapes and 10 colors: red, orange, yellow, green, dark blue, light blue, pink, black, white and natural wood. The keys are numbered from 0 to 10 on one side and contain the corresponding number of dots on the reverse. Also includes a string key ring for threading. Rainbow Wooden Keys enhance fine motor and early math skills as children count the dots, thread the keys and sort by color. These keys are stained with muted non-toxic paint that displays the wood's natural grain. The smooth surfaces and bright colors promote calm and concentration. Use these keys for loose parts play or add them to a sensory bin for kids to arrange and explore on their own terms. Young hands are safe to explore the smooth surfaces without splinters. For ages 10m+. Size of longest key: 4.7"L. Recommended age 10+ months