Here's another idea using the Sale-a-Bration Happy Hello Simply Sent kit.
First I stamped the "Thanks" image in Island Indigo in the top left corner. I then added a strip of Sycamore Street paper to a piece of Tangerine Tango card stock, trimmed to fit across the card.
I took 2 pieces of the Island Indigo Sale-a-Bration ribbon and tied them around the strip and mounted it onto the card.
I popped out a little scallop circle and added a Pool Party button with some Linen Thread and added ti as my finishing touch.