Measurement Made Fun! Heavier or lighter? Taller or shorter? Compare linear measurements and use the tree-themed balance to compare weights. Balance arm snaps into place for quick assembly. Calibrates easily with sliding compensator clips. Set includes: - 24 caterpillars in two sizes and two weights (8 large, 16 small) - 36 leaves in two sizes and two weights (12 large, 24 small) - Activity Guide Balance measures 15.75"L x 4"H Grades: K+ Learning Resources, a world renowned developer of quality educational toys for the past 50 years, is now presented in South Africa by Let's Learn Toys. All Learning Resources products are compliant with EN71, ASTM, RoHS and EEE safety standard. Learning Resources is committed to the safe disposal of electronic equipment under WEE regulations. What's in the box Set includes: - 24 caterpillars in two sizes and two weights (8 large, 16 small) - 36 leaves in two sizes and two weights (12 large, 24 small) - Activity Guide