Check the listing for details. Electrical Circuit Experiment Kit 1set DIY Circuit Experiment Small Bulb Ligh.... Condition: New. Listed at 11.52 USD. Note: you need 2pcs AA batteries to do experiments this kit Application: used in electrical experiments in primary and middle schools/home DIY circuit test Package includes: 10pcs 2.5v bulbs 1pcs battery case 1pcs switch button 2pcs wires 2pcs Lamp holder Fun and safe: when conducting these experiments, stimulate curiosity and Intelligence IQ. Note:that the positive and negative poles should not be directly connected, which may cause a short circuit. Application: used in electrical experiments in primary and middle schools/home DIY circuit test. Kind note: you need 2pcs AA batteries to do experiments this kit. Package includes:10pcs 2.5v bulbs,1pcs battery case,1pcs switch button,2pcs wires,2pcs Lamp holder.