Top one has a rigid bicycle chopper triple tree front end, bmx type stem and bars. Painted to look like shocks.
Also looks like a sturmey archer bicycle drum brake up front. They have triangle cut-outs on the side of one hub flange. Wheels are probably bicycle 20", judging from the way the fender is too large.
Rear end has a bicycle rear triangle. Look close and you see the seat stay top tube in front of the shock, and the chain stay tube right behind the cranks, that's mostly covered up towards the rear.
Bmx cranks with a bicycle bottom bracket.
Looks like they hacked a Puch down the middle and covered a bike with it.
Motor looks like a piece of styrofoam or something.
Hell of a lot of work when they coulda just found an old non running Puch for a prop.