An envelope and card in one! The Pink Stripe Love Letter is a stationery set that comes with everything you need for 2 letters! Write a lovely message to a special someone on the inside of the heart shaped card then fold it into an envelope and seal
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.