UGears Pneumatic Engine mimics the working of a steam engine to perfection. Its mechanism generates real pressure coupled with the noise that pneumatics are well known for. This wooden pneumatic IQ mechanical toy is a small but fully functional example of a steam engine, except that it uses air pressure instead of steam to set it in motion. This model includes a built in air pressure gauge and two compartments for storage and spare parts, and is able to generate enough force by squeezing the balloon (not included) or blowing into the opening, to spin the wheels. Be a part of the once great era of steam with just a breath of air!