Maybe it didn't make it to the Den...

Saw a teleshopping ad for a solar powered car cooling fan - to stop 'unbearable heat' building up in a parked car on a sunny day.  Truly a useless invention for a problem that didn't exist. Or worse, an encouragement to leave kids/dogs/the elderly/ice cream in the car and not worry about it again.

You'll find it easily if you google it, and you can see the wonder of modern technology at work.  Or watch the hyper-cheery sales driven feature on shopping TV, up in the 600s if you're a Sky slave like me.

I have a feeling it was invented by car thieves who fancied an easier access point than having to jimmy the lock.  Clever them.