Iantha Naicker is a talented illustrator from South Africa. She recently did a mini-series of drawing that are beyond cute. His characters don’t want to stay still on lined paper, so they play with the lines.
I like this idea, but would try to extend the water theme. Put plastic fish inside with a gift card to Bass Pro Shops! A gift card to the pool store or local water park would be fun too. I'm all about making the gift card connect.