Contains enough pieces for a classroom of children to share their ideas and inspire their classmates. With 96 pieces containing over 300 magnets, this set is extremely attractive to teachers and students alike. Includes 36 squares, 60 triangles, a teachers guide and a reusable storage tub. Simple color coding demonstrates polarity, so teachers can combine the fun of construction with lessons on polarity. Square pieces measure 2.4" x 2.4".