For my daughter's 6th birthday we had a Mermaid Party. It was not a Disney Little Mermaid party, but a real mermaid party! I stole ideas from many sources.  Our invitation was white paper finger-painted with blue sparkle paint, cut into squares and glued onto light blue construction paper folded into cards. A mermaid sticker on top of the finger-painted piece completed the outside of the card. Inside I wrote the particulars in a rhyme, which I can't remember now. The activities were set up in stations in the backyard and girls could roam as they pleased. One station was a shell necklace.  We had tiny shells we drilled holes in and the girls threaded them onto fishing line. Another station they made mermaid crowns.  I bought gold bulletin board borders and cut them to fit each child's head. Glue, blue and green glitter and sea life sequins were provided to decorate the crowns. Then each crown had a seahorse glued dead center. The seahorse was a bumpy chenille stem cut with two bumps and bent into an S shape, and a wiggly eye glued on. At another station we put blue sparkle gel on our cheeks and an old-fashioned mermaid tattoo. I filled the wading pool with water and threw a couple of green plastic bowls into it and provided a treasure box of pennies to try to pitch into the bowls. And we had a dishtub full of bubbles with bubble wands, strawberry baskets and six pack rings to blow bubbles with. We set up a blue striped screen room (borrowed from a friend and tied a blue or green balloon on each chair.  They had sea life shaped spagettio-s, blue jiggle Jell-O with Swedish fish inside(like a gummy fish, goldfish crackers of course, and instead of cake, I put molded vanilla ice cream in a sand castle mold. I sprinkled it generously with cinnamon sugar to look like sand and scattered shell shaped candies around the base of it. I also made star shaped (star fish shaped) sugar cookies. Each girl's goodie bag contained mermaid stickers, a few more starfish cookies, gummy fish, sharks and octopus, tiny bottles of bubbles and a 10 cent feeder goldfish in a ziploc baggie! It was a beautiful October day, the sun was shining and the girls had a great time.  I was pleased with the results too!