The base is the Tri Fold card, found here. This card comes with the base and the svgs for the patterned papers that go on top. It's a great file to have on hand. You can use it for all sorts of occasions. I like to load my mat with a bunch of coordinating papers, cut them out, and mix-n-match to make lots of card bases to have on hand.
That adorable bear is discontinued now. He's Acorn Bear. I've had him for awhile, but this is the first chance I've gotten to use him.
This is what it looks like all opened. I love the colors of the fall papers that were in my scrap pile. They're from K and co. I used brown skittles to decorate the acorn, and popped him up on dimensionals.