Learning Resources 0.5 Cm Plastic Pattern Blocks invite children to analyze, compare, and compose 2-D shapes. Use the 6 shapes and colors to explore symmetry, area measurement, and more! The Learning Resources 0.5 Cm Plastic Pattern Blocks Set Features: 100 Plastic blocks in 6 shapes and 6 colors 0.5 cm thickness Largest blocks measure 2"W. Grades PreK and up