Includes 150 magnetic pieces and 24 reproducible activities. Use the 108 magnetic pattern block pieces to teach spatial relationships and simple geometry. The 42 tangram pieces (six tangram puzzles) are a great, hands-on resource for teaching mathematical reasoning and problem solving skills. Manipulatives are magnetic, making elaborate patterns and puzzles stay in place. The kit also includes a companion activity book for both sets of magnets and two of our top-selling magnetic receptive Kidboards™.