I didn't bring a hostess gift with me, but I brought supplies. During a few nap times I put together a set of quilted coasters for my cousin as a thank-you for her hospitality!
I'd cut the squares and batting a few months before with another hostess in mind, but didn't end up using them. When packing supplies for my trip, I included these pieces, not even thinking of how well they fit my cousin's colors and aesthetic. Hooray for serendipitous planning :-)
Bonus: the coasters double as blankets for the youngest daughters' favorite four-inch princess figurines!