Ugears DIY wooden self-propelled 3D puzzle Pneumatic Engine - New In Box

Be a part of the once great steam era with just a breath of air. The Pneumatic Engine is a small but fully functional example of a steam engine, except it uses air pressure instead of steam to set it in motion. Use an ordinary inflated balloon and watch the pistons and gears chug along just like the locomotive engines of yesteryear. The model has a built-in air pressure gauge and two storage and spare parts compartments. Self-assembly: No glue is required Model size: 6.4*3*3.9 in (16.2*7.8*10 cm) Package size: 14.6*5.5*1.2 in (37*14*3 cm) Number of components: 81 Level: Easy