Size: 3.03 inches * 3.94 inches * 3.23 inches (7.7 cm * 10 cm * 8.2 cm) Material: Acrylic metal plastic Model characteristics 1: Characteristics of creative physics experiments of experimental science educational toys 2: Features of scientific training to improve cognitive thinking ability 3: Exploring Science Early Learning Education Science Battery: Provided (AA batteries are recommended) Packing: 1 set/bag