Cute card by kolling143, via Flickr. This design would also work for any celebration, just change up the colors for a baby shower or make them the wedding couple's colors for a bridal shower. Could also work for a retirement card, congrats on your promotion, and a lot of others. ;-) The name of this design is versatile!
Use the Happy Heart stamp set and Cover plate to create this Happy Birthday card with a rainbow of pastel colors. Pop some of the hearts with foam tape for a layer of dimension - add sequins for some sparkle! Handmade card