The Physics respource set covers the 7 STEM series seys plus the Solar power set you can build numerous models with the 8 work bookes supplied. Easy to follow instructions and extra builds online. Develop your STEM principles. Stem instructions and workbooks included. Multiple builds possible. Online model plans. Fully compatable across all engino systems. Develops STEM principles. Size H37, W49, D16cm. For ages 3 years and over. Manufacturers 3 year guarantee. WARNING(S): Not suitable for children under 3 years old. Only for domestic use. To prevent possible injury by entanglement remove this toy when the child starts trying to get up on its hands and knees into a crawling position.