3 years & up. Explore STEM concepts with this set of colorful, clear photos and facts. This collection of books cover Math, Magnets, Materials and Matter. Children will learn about Math at the Vet with counting and time, Math at the hospital with Measuring, Counting, Shapes and more. They will lear about Magnets, different types of Materials, like plastic and all about Matter, which is all around us. Set of 5 paperback books.