Create 3D structures from 2D nets with the 30 Piece Set! Follow the step-by-step idea booklet to build a magic ball, houses, towers and much more! This is the ideal set for ages 6 and up. The set has 30 total pieces: 12 triangles, 18 squares. These squares and triangles come in a rainbow of colors. The Magformers Rainbow 30 Piece Magnetic Construction Set is an engaging way to build problem solving and visual spatial skills.