About this item:
hese boxed sets include color-coded, 2" EVA foam magnetic discs that are great for demonstration purposes, whether in a group or working with individual students. Use them to illustrate math functions, base ten, and more. Each set includes a plastic sorting tray. The color-coding matches that of the Sensational Math Value Disc Sets. 
20 each of 4 values: one, ten, hundred, thousand.