It has long been a desire of mine (MrB) to build a hovercraft with my students... I've been a Hovercraft afficionado since the "flying saucer" ride in Disneyland in the early 1960's. In addition to the Disneyland hovercrafts, I've ridden a SRN4 from Calais to Ramsgate, a SRN6 from Isle of Wight to Southsea, and a sidewall hoverferry (HM2?) in Hong Kong. So - How about building one in Physics Class?
I had long seen the plans for a simple 4 foot around / shop-vac powered / single seat vehicle... Finally: Plastic, wood, duct tape, staple gun, sabre saw and drill all came together with the physics class.... Here are the basic plans
(Here's a set of plans I stared at a lot in ?Jr High?)
A 4x8 sheet of plywood (122cm x 244cm) humorously turned into a 4 foot/122cm diameter disk. With duct tape on the edges and a hole suitable for the shop-vac placed half way between the center and the rim - Plastic (6mil) was added, stapled (with a staple gun), and duct taped yet again. The bottom "can lid" was screwed on and the 6 air holes (2 inch/5 cm each) were cut into the plastic. Pretty much done.... add a low stool and insert shop-vac with extension cord.... ready to go. (OK, then we added more duct tape; under the can lid, around the edge of the plastic and over the staples and finally around the rim. (all the places it had blown out the first time!))