A little pricey, but still very cool “This is a spectacular magical art for you to put together and is made with paper entirely (except two little wood sticks). This “V-Twin Engine” has semi-realistic exterior and interior detail. The size is about 50% of real engine. It is powered by hand. All patterns of parts are printed on the high quality neutral pH and acid-free heavy paper, which can last for many years and will not turn brittle and yellow or fades with age. All parts are to be cut out and folded. No paint applied. It looks pure and elegant. Various shadows created by different light sources make the appearance more 3D” Link.