Specification:The Basic Electricity circuit kit includes everything that you need to get started, provides a hands-on opportunity for students in grades 2nd-8th to build simple circuitsWith our physics lab kit, you can build many interesting experiments, such as stair double-switch circuits, traffic lights, electromagnets, hand-cranked generators, series and parallel circuits, etc. The kit contains English instructions, it starts simple to gets little complex, and introduces various basic circuit experiments and magnetic knowledges.https://simplebooklet.com/bits4botscircuitexperimenteng Note: This set does NOT contain two AA batteries. You need to purchase 2 AA batteries to drive the circuit.Package Including: 2 X AA Batteries Holders2 X Bulb Holders5 X Bulbs2 X Switches(SPDT)1 X Switches(SPST)1 X Hand crank generation model1 X Compass1 X Wind Power Car1 X Screwdriver10 X Cable1 X Electromagnet1 X Double LED board1 X Transparent storage box1 X Small wrench Description:DIY assembled wind power car toy model kits set, educational science physical DIY energy conversion experiments toy.Energy conversion principle : electric energy convert to wind energy through mini motor, reactive force makes car to go forward.Happy and easy to learn, exercise your children's practical skills.Develop children's hand & eye coordination, and help children experience the theory of power, expand kids scientific & mechanical interest.Great scientific experiments lab teaching aids school supplies, cool designed DIY scientific toy gifts for kids.Specification:Material: PlasticSize: Approx. 135x80mm/5.31x3.15inchPower: 1x AA Battery (Not included)Package Includes:1 Set of Wind Power Driven Car Kits