Designed to use alongside the Dinosaur Bones, these exciting and wonderfully attractive activity cards encourage children to match, count, compare, order and measure the bones they discover. Made from durable plastic, the cards are tough enough to use in sand, water and outdoors as children discover the buried bones. Each set includes 16 colorful plastic cards measuring 8" x 11". A playful way for children to take their first steps into measurement. Age 3+.