Here are some of mine as examples:
Salted bandages
Inflatable Dart board
Non stick Cellotape
A black highlighter pen
Glow in the dark sunglasses
Smooth Sandpaper
Waterproof Teabags
Battery powered Battery Charger
Silent Alarm Clock
A Pedal powered wheelchair......
Anymore out there???
how about
invisible house - a security must.
indoor sundial -
political hotair collector - an alternitive energy source ?
wedge proof underwear
fly screen doors on submarines
instant water ( just add water)
that thing before sliced white bread
fire resistant matches
Hey Darryl.
Testing your new "Saufmaschine".
BierSuip quickdop
yesh i shink
Sunglasses for the blind
Automatic nonsense eraser in the net sobored
Do you know the silent song?
Well, I've never heard it.
An ejector seat for a helicopter - it works chop chop!
Kenny, "fire extinguisher" ??
laughpoint
a nailbrush with real nails