This 72 piece set represents the basic elements of nature. Each piece mimics the form and color of real world resources: sand, water, trees, stone, steel, balls, people, wood and bricks. The different angles and shapes encourage children to build and balance on resources to create unique masterpieces that defy the laws of gravity. Young learners are able to use their imagination to create endless possibilities without any joint or lock, but using only balance for the pieces. These great open-ended STEM materials require the craftsmanship of a builder and the mind of a visionary. The different angles and shapes help children with fine motor skills, problem solving, eye-hand coordination, and spatial awareness. Building on Resources is made of high-quality TPE plastic that gives it an interesting tactile texture. For children ages 3 yrs. .