I would make soup bowl holders and sell them in 4's 19.95 a set.
Bring a bowl and micro wave and heat some apple crisp, so they can smell it, give little pieces in a cup cake paper. This keeps their interest and gets others to come to your booth. Show them, how you can hold the hot bowl and sell them a set. Cost to make is about $1.10 each. Insul=bright and cotton at 10.95 a yard.