Kids, are you tired of walking everywhere? Why not just float on air instead?
All you need is:
a) an ordinary vacuum cleaner motor
b) $3 for plans
c) a father
d) a jacket or pair of jeans, for your astronaut iron-on, free with every order
e) did we mention $3 for “plans”?
You too can be floating around your school in the “lowest cost man size air car in the world”!
(from Man-Thing #20, Marvel Comics, August 1975)