The Yellow Door Dinosaur Bones Discovery Set is guaranteed to inspire and excite children. Even those who don't love dinosaurs will enjoy burying and unearthing these bones in soil or sand. Better yet they are made from a durable stone mix so can be used both indoors and outdoors as well as being easy to wash! The set includes 12 dinosaur bones in 4 different lengths so encourages children to sort order and compare.Encourages imaginative playPromotes mathematical language and classificationDevelops conceptual understanding of big and little same and different long and shortBone lengths range from 600-1200mm. Age Suitability: 2 years +