Specification:Item Type: Electric Circuit Experiment KitMaterial: ABSBattery: 1 x AA Battery (Not Included)Purpose: Cultivate children's interest in learning.How to Use:Step 1: Surround magnetic coil (red coil 9 turns and black coil 8 turns) Step 2: Connect the negative electrode of the battery box Step 3: Cover the heat shrink tube Step 4: Connect cables to the battery box Step 5: Connect the triode (note: when wiring, the plane faces up) Step 6: Sand the end of the enameled wire Step 7: Connect the coil Step 8: Attach the coil to the top cover Step 9: Close the bottom box coil to connect the lamp Step 10: Install the battery yo testPackage List:1 x Heat Shrinkable Tube 3 x Foam Glue 1 x Sandpaper 1 x Magnetic 2 x Coil2 x LED Lamp 1 x Triode4 x Wire 1 x Storage Box 1 x Battery Box Note:This product contains small parts, kids should be used under the supervision of adults to avoid accidental ingestion by children.