2 yrs. & up. These wonderful, tactile dinosaur bones are guaranteed to excite! Bury them in sand or soil, place them in the water tray or leave them outside to be discovered. These playful pieces are a fun way to introduce and practice early math and language skills in an engaging and relevant way. Durable enough to be used in an Early Learning classroom and safe for outdoors use with your youngest learners. The set includes 16 white dinosaur bones in 4 different lengths.