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 PVC the cards re tough enough to use in the outdoor area (including water play) as children discover the buried bones. Each set includes 16 colourful plastic cards measuring 275 x 210mm. A playful way for children to take their first steps into measurement.