This is a super simple card using the triangle stamp from the Pennant parade stamp set. I used Island Indigo (hard to tell from the picture! but it is!) and stamped the triangles then grabbed this greeting from a hostess set that has retired... popped it up on dimensionals and poof- there you have it.
The idea was cased from Escape2Stamp's Adriana Benitez. I just simplified the design a little for my own needs and what I had on hand!