Understand engine - assemble it and know engine structure. Leaning engine theory - Learn how the engine works. Intake, compression, work, exhaust. Logical thinking - Assemble accessories to improve logical thinking and hands-on ability. Why call It V8 - A type of engine has 8 cylinder and show them with V shape. Simulated exhaust and ignition - Engine exhaust and ignition are achieved by air pressure. We simulate the ignition through the valve opening and closing process. Size:25cmx18cmx19cm Show results: The LED lights up emits the sound of the engine and turns off after about 30 seconds. Colour:As Shown Material:Plastic Package Contents: 1 * V8 Engine Model kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.