Insane things to play with.

[Combwork]

Keeping it to things you could buy over the counter, has anyone heard of Lawn Darts? Made by Waddingtons in the 1970's. A very large dart-board printed on a plastic sheet and spread on the ground. The 'darts' were about 2 ft long with a point at one end and fins at the other. The idea was to throw them vertically so they swooped down in an arc to land point first on the 'board'. They were advertised on TV showing a happy family managing not to impale each other.

I know this is a dangerous challenge to throw out, but surely this must be the most insane thing to sell as a toy.