Which weighs more — my apple or your pear? A cup of beans or a cup of rice? Children experience real hands-on science and measurement with this calibrated scale, perfect for exploring concepts like equalities, inequalities, mass, comparisons, and order. Comes with ten brass weights from 1g to 50g in a built-in storage box. The large capacity, 2" deep removable bins hold solids or up to ½ liter of liquid. A calibrated pointer shows when bins are balanced, and a damping button prevents rocking. Plastic. 11" x 3¾". Ages 5 and up.