Description: Featuring educational, this model toy can help children develop their interest in science and their intellectual ability, innovative thinking, hands on ability. Multifunctional feature ensures it can cultivate children's thinking ability and hobbies. It can stimulate children's interest in learning and curiosity through DIY small production, and let children understand abstract knowledge through disassembly and assembly. Made of plastic and electronic component material, it is eco friendly and safe. The length of battery box is 5.5cm and the width is 3.2cm. The length of switch is 4cm and the width is 2cm. Suitable for school, home, teaching accessories. Item Name: Circuit Material Toy Material: Plastic,Electronic Component Battery: 2 x AA Batteries (Not Included) Suitable Age: Over 5 Years Old Features: Safe, Reliable, Creative Size Details: Battery Box: 5.5cm x 3.2cm/2.17" x 1.26" (Approx.) Switch: 4cm x 2cm/1.57" x 0.79" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Principle: One connection point of the bulb is connected to the positive electrode (or negative electrode) of the battery, and the other connection point is connected to the negative electrode (or positive electrode) of the battery with a wire to form a complete loop. Package Includes: 1 x Circuit Material Toy (Including Small Machine Tablet, Electric Bead, Base, Aluminum Rod, Switch, Battery Box, Plastic Rod, Toothpick, Wire)