Welcome Mona G, There are no rules in this swap except for being bigger than a mug rug and smaller than a lap quilt. Take all your experience and do what you like or challenge yourself with something new. A new technique or color combination, applique, thread painting, landscapes, collage, curves, miniature piecing or paper piecing, as examples. These small creations are a perfect place to explore the new or work towards perfecting the perfect HST.
Look through some of the old swaps and see what people have made, for inspiration.
Do what you like, you don't have to please anyone or make something you think everyone will like, that is impossible.
We are here to help along the way to answer questions and help.
Lots of us like to do seasonal pieces so we can change them out every so often or sewing related themes for our sewing areas. Something whimsical is always fun too.
Hope some of this info helps you get started.
peace