DIY Electromagnetic Experiment Material Kits Kids Students Science Physics Educational Project Toys Set Features: Exercise children's hands-on ability, let them understand simple knowledge about electric magnet. Specification: Material: Metal+ Plastic Size: 8 X 2cm/3.15 X 0.79" Color: As Shown Recommended Age: 7Y+ Warm Tips: 1. When assembling the product that requires the circuit, pay attention to the fact that the red wire is connected to the positive terminal of the battery case; the blue wire is connected to the negative terminal of the battery case. 2. All products is NOT including battery, the accessories are random in color, color is NOT specified, please read it carefully before purchasing. 3. Contains small accessories and sharp objects, children must be accompanied by an adult, please take care of children to avoid swallowing. Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3mm measuring deviation due to manual measurement. Included: 1 XDIY Electromagnetic Experiment Material Kit