Here is another cool gift idea for aviation enthusiasts in your life. This Motorized Radial Engine Model is a 5-cylinder 4-stroke airplane model inspired by airplane engines used widely in the 40s-50s. It has Cherry and Oak wooden parts. You will need 4 x AA batteries to run this.
Darrell who runs AeroModelArt is the retired mechanical engineer behind this piece of art. You can find his work on Etsy.