Wow, that brings back memories. My parents had me using these from preschool to probably fourth grade. They sure made math a lot more fun. It's funny, I can

Wow, that brings back memories. My parents had me using these from preschool to probably fourth grade. They sure made math a lot more fun. It's funny, I can actually trace my number synesthesia back to the colors of the pieces. The only exception was the number 2. I remember being frustrated that the Cuisenaire 2s were red when 2 was so obviously yellow. Sometimes I would even avoid using those pieces, just because they didn't match the numbers I was writing down.