Begin early exploration of physics, STEM lessons and architectural design using this 40 piece set. 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 marbles and 36 block pieces (each measure 2.75"W) scaled to unit block proportions allowing for multiple run path possibilities. 40 pieces in total. Ages 3 and up.