Don't make the mistake of choosing something too big for a boy or a girl to carry through. Perhaps the following will be suggestive:
1. A newspaper stand.
2. A miniature truck farm in the empty lot next door.
3. A pop corn wagon.
4. A fruit cart or stand.
5. A shoe shining stand.
6. Raising ferns or flowers for sale.
7. Buying vegetables from a farmer and selling them to housewives.
8. Printing business cards and blotters on a small press.
9. Making place cards.