As a kid, during the summer I'd make money catching nightcrawlers after heavy rains and selling them.
I would keep 2 1 gallon milk jugs with the tops cut off on my belt through the handles so I could keep my hands free. Also duct taped 2 flashlights to one of those old plastic baseball hats you could get at the Brewer games before headlamps were cool and easy to get.
I'd package them up a dozen to a box, using the little milk cartons I'd dig out of the elementary's garbage, selling them along the lake shore to people already fishing. What couldn't sell in a day or 2, I'd walk down and ditch for a discounted rate to the local bait shop. At first he was made kids were stealing his business away, but in the end he decided to reward us for working and bought them from us.
I wore all my entrepreneurship out at an early age.