Pattern Blocks are universally accepted material for Number Relations, 
Pattern Making, Fractions, Tessellations and Symmetry. Children of all ages use 
this material, complete with six shapes and six colours (yellow hexagons, orange 
squares, green triangles, red trapezoids, blue parallelograms and tan 
rhombuses).
These 10mm blocks are thick enough to stand up for 3 dimensional 
patterning.