Product ideas!?

Question

I am a year 10 student at high school, and i need to think of a product to sell at market day. it should be suitable for 13-18 year olds, and not be any kind of food. Please help! it also needs to be useful

Answer 1

yor old dresses will do or old stuffs. books and the like. some sort of a bargain sale. ^^,

Answer 2

I know sounds a little crazy and I dont know if you actually have to have te item like a science fair.... but here is the product I thought about:

A phone with voice activated texting.  So instead of having to text it, you say it and the phone writes it.