
Just like the set my mom gave us in 4th grade, they're light, strong and perfect for adding basic math with concrete visualization. Just so you know, they're hollow and won't work if you're thinking of using them on a weight ratio scale (10 blocks don't weigh the same as a block of 10). However, they are perfect for scaling, so you can string them together and they all easily connect to each other. My child loves it when we introduce them to basic math on worksheets.

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