It took approximately two years to design this spectacular magical art for you to put together. This “V12 four-stroke Engine” has semi-realistic exterior and interior detail. Each of 12 spark plugs (LEDs) is ignited accordingly to the moving cycle. Many moveable parts include a compound crankshaft, a rapid cooling fan, 12 rods and 12 pistons etc. It is made with paper entirely (except some little wood sticks, some tapes, 12 LEDs, some electrical wires, 12 switches, a resistor, a motor and a battery holder).It looks pure and elegant. Various shadows created by different light sources make it look stunning. The origami-reinforced structure is applied in the engine (they will not be seen). The origami-reinforced structures make the model very rigid and keep the pieces in the accurate positions.