Adorable plastic bears in three sizes, three weights and six colors are just right for mass comparison, counting and sorting. Bears are proportionally weighted to use on a balance for measurement discoveries. 96-piece set contains 24 Papa, 24 Mama and 48 Baby bears. Papa weighs 12 grams, Mama weighs 8 grams and Baby weighs 4 grams. Packaged in handy storage bucket. Grades PreK and up. Use with Sorting Bowls (sold separately) for fun and easy grouping activities.