Children 3 and up will have a great deal of fun playing with the Unit Block Marble Run. They can also begin early exploration of physics STEM lessons and architectural design. The rubberwood blocks feature drops bumps and routed paths that allow for multiple building opportunities. 10 double-sided concept cards provide building inspiration for different block arrangements as well as corresponding lessons related to physics theories.Set includes:4 starter acrylic marbles36 block pieces scaled to unit block proportions allowing for multiple run path possibilities.Age suitability: 3 Years+