J.G.
As a shopper, I'd want it to be reasonably priced (duh) and perhaps have a deal like "buy 3 get one free" or something like that.
Perhaps have some 'sets' made for mom. You can sell those sets to the men who never know what to give their wives. Perhaps make a sign stating so "Never know what to give your wife? Give her a night to herself to soak in the tub." Include some votive candles or chocolates in the set.
Can you have some soaps opened so people can smell them? Everyone likes free samples, even if it's a sample of a scent. Perhaps you could put a bar or two in the bathroom by the sink at the craft fair along with a little index card table-topper that says where your booth is if they'd like to buy your soap they just tried.
I for one, buy my soap at the grocery store as it is more reasonably priced and I know it gets the stink off my husband. ha. But if I saw a deal then I may buy soaps from a craft show like this. I like the toy idea. I may need to buy some of that for my 2 yr old.