GC133 Use a Set of Stamps

This is the birthday card I made for my daughter's 13th birthday. I used an unusual card fold from Technique Junkies and paper and stamps from Graphic 45. I'm entering it in the Gingersnap Creations Challenge to use a set of stamps.
This is how the card looks closed.

And this is how it looks open. This is where I used the Graphic 45 stamps. I also used a birthday sentiment from Hero Arts and some Thickers for the #13.