What would be some good things or ideas for things to sell at a mini-mall at school?

The best things to sell at a mini mall is clothes, jewelry, stuff animals, foods, and books.

Consider what most students need on a daily basis (fast turn over products)

Stationary, line pens pencils paper notebooks

Food likes with GOOD shelf life like candy, chips, chocolate.

Drinks - canned and plastic bottled - glass is difficult to dispose of even when there are recycling opportunities.

Consider school sports ware -

And

Consider running a small survey across the school to find out what the students might like