"Starting with an ice cream," she said, " I really think it's a good idea working up to a food truck." But London and Bryn are learning that good business isn't just about making money.

Ice cream trucks and carts, from the bike-and-cooler rig Green pedals in Hawaii to the Fudgy Wudgy Man (now men and women) who walk the beaches along the Jersey Shore to the Good Humor and Mister ...