Try to learn their name and use it often. It makes them feel important. Some customers will go home and wish they had made a purchase. They will look you up at your next show if they know where to find you. Leave your children at home.
Shows are long and boring for young children.
A whining child drives away customers and distracts you from your job . Some customers may be buying for a social committee or the like, and require a receipt. Presenting a buyer with their newly purchased treasure in an old grocery bag is poor business practice. Have business cards out on your table. Working with a cardboard or plastic box looks unprofessional.