Construct a machine that moves by air flow and air pressure Learn how air pressure moves objects Build a hovercraft Includes a 32-page, full-color manual and 59 building pieces Ages 8+ yearsLearning toy has kids construct a working machine that is propelled by air pressure and air flow. The included blower motor uses an impeller to increase air pressure under the machine and the soft-bladed fan creates a stream of air to propel it forward. Build everything from a batting machine, a basketball launcher, a moving car and more! Air-Stream Machines is a great hands on science experiment for kids. This toy requires 6-AAA batteries (included). For ages 8 years and up.