The Thinking Kids"(R) Math Pattern Blocks are a perfect way to bring hands-on learning in the classroom while supporting the Common Core State Standard for math. Pattern Blocks are the ideal hands-on learning tool for helping students visualize patterns as well as grouping and same and different concepts. This set includes 250 pieces (shapes include: yellow hexagon, tan rhombus, green triangle, red trapezoid, orange square, and blue parallelogram).