What a great idea! But from going to shows like that myself.. two 6' long tables SOUNDS like a lot.... but you'll quickly find out how little it really is! Try laying the stuff out on the floor of the largest room in your house and you'll see that they take up a lot of room very fast!

A photo album is DEFINATELY a great idea -- especially for the fish one! You can get a few inexpensive easels at the arts & crafts store to display a sign and prices. Mount the signs onto a thick board so they don't sag. Perhaps have a few clipboards with "forms" for custom orders, along with a few fabric samples for people to choose from.

Whatever she normally sells them for - add $10 or so --- people at these shows will pay for it. Add more for the custom ones. Believe me, they'll pay it! If they aren't buying, then have some flyers under the tables to whip out as "show specials" where you offer a special $10 off coupon! Tricky, eh?