Learning Resources 0.5cm Plastic Pattern Blocks (Set of 250). This comprehensive set of 250 plastic pattern blocks includes six shapes and six colours. The sturdy 2D 0.5cm blocks help to introduce a variety of numeracy skills including patterns, symmetry, linear and area measurement as well as introducing the concept of fractions and problem solving. Pattern Blocks measure 0.5cm and this set includes a teaching guide. Suitable for ages 3+