Encourage children to match, count, measure, compare, and order the dinosaur bones they discover. This set of 16 bones includes 2 each of 8 sizes of bones with 16 plastic activity cards. Some activities require matching bones to their shadows and others measure bones with the unit of measure printed on the cards. The bones can be buried in soil, sand or water and are completely washable for use with a sensory table or outdoor play. For children ages 3 yrs. +.