Large plastic interlocking weights allow students to build and compare weights. Set includes 20 yellow 1g weights 10 orange 5g weights 5 green 10g weights and 5 blue 20g (total of 40 pieces and 220g). Each weight is 7.6cm x 7.6cm square. Gr. K-6.
This product contains small parts and is a choking hazard so not suitable for children under 3 years old.