Through Pattern Blocks kids develop an understanding of: geometry- shape, symmetry, tessellation, angles, measurement-perimeter and area, algebra-pattern, and number-fraction. Pattern Blocks help children learn about shapes, symmetry, numbers, patterns, measurement and fractions. They also help to build spatial memory and spatial visualization skills. Use the included activity guide for ideas on how to build early math skills with pattern blocks. Build language skills by investigating and identifying shapes, components of shapes and pattern/pictures formed. Each set includes 120 plastic pieces in 6 standard pattern block shapes and colors, conveniently packaged in a storage jar with lid and carry handle.