I found this thing on a blog... i don't remember it.. :(
I don't think this project needs any explanations.. even though ask me if needed...!!
Here's how I made them using stuff I had in my studio.
Bullet Bill card outside, Super Mario World scene with pull-tabs inside
make this super cut and super easy vintage valentine for special friends and family this year
Lovely Trees Christmas card Tutorial
My Mother's Day Card
When one Valentine's card won't do!