With 20 planks and 40 puzzles this is a great starter kits foryoung builders. Each card features a fun, recognizable 2D object and the goal is to recreate the pattern into a 3D structure with KEVA planks. Strengthens STEM, fine-motor, strategy, physics and basic engineering skills. Includes 20 durable planks and 20 double-sided cards in a zippered carrying case. Ages 4+.