Have a birthday theme , of course!
Demo a birthday card, the jumbo wheel with the perfect polka dots wheel or the posies & polka dots making wrapping paper and a simple gift tag ,and a party favor like a cello bag filled with chocolate and a topper. You could pre- make a card and on the sly pass it around to everyone to write messages to the birthday girl/ hostess. Then you could present it to her at the beginning of the demo. Have fun with it!
Janet