[Michael Fortier]

Using Cell Phone Technology create a device that can be placed on elderly and small children so that when they get lost they could be located. Have it with an automatic on so that they wouldn't have to press a button to answer. You could just start talking to them and them to you. Also include a panic button on it for emergencies.

Reward: Trip to Europe with my wife.

[fiabelle]

Great idea, but it already has been invented.

[Michael D. Grissom]

The description and photos of this marketed product are within a topic on this site.

That's proof positive that you had a great marketable idea!

If you have just one great (already successful) idea, it usually means that you are capable of MANY great ideas. Don't stop!