This cute pop-up bunny greets the recipient as it pops out of the envelope. The construction of this bunny is similar to my previous Valentine pop-up. https://papercraftetc.blogspot.com/2019/02/valentine-pop-ups-bear-cat-and-dog.html
Here is the PDF. I used 65 lb. yardstick for the bunny and copy paper for the envelope.
Here is the .Studio file.