One of the upcoming classes I have is a 3-D card featuring images by the Layers of Color company. I took a class with them in March, and fell in love with their stamps and the project. Here is a side view of the card, so that you can see that it has a front, middle, and back layer:
The best thing about the card is that it folds flat to fit inside an envelope. On the class supply list, I told people to bring whatever markers they want. If you are taking the class, I encourage you to think about the recipient of the card to help you pick colors for the flowers. You don't have to use yellow and purple like I did!