We made these cards yesterday in my Summer and Sea class, I cant remember what they are called, but they are actually very simple to make and I got the video tutorial link from Francis aka stamp owl in oz (sorry I am being lazy in not linking here) but check of Francis's amazing cards whilst there! so its a two in one blog hop! - Francis' link is on the right in American and Australian links, quiet near the bottom.
THe mermaid isnt the Summer and Sea collection but went quiet well. All stamps are from The Glitter Pot. I used Doodlebug glitter card.
We also made some mini cards and a little wallet decorated with the Penny Black 12 days of Christmas but I forgot to take a photo of it.