Geometry tangrams used to explore shape size comparison spatial reasoning patterns and designs.Learning Advantage Tangram set is ideal for ages 5 - 13 and grades K - 7th. Tangram set is used to explore shape size comparison spatial reasoning patterns or designs and includes 4 pieces per set. Age group and grade: Ages 5 - 13 and grades kindergarten - 7th. Subject: Geometry. Usage ideas: Used to explore shape size comparison spatial reasoning patterns and designs. Brightly colored plastic geometric puzzles. Small parts not for children under 3 years. 4/pack. Explore shape size comparison spatial reasoning patterns and designs. 28 pieces per pack. Sold as 28/Set.