Annie's Attic Interactive Cards book, but found the instructions to be too confusing and difficult to follow. Then a few months ago, I saw this card again, created and shared by my very creative blogging friend Michele, on her blog, My Simple Crafts. Loved how Michele's cards turned out, and I'm so grateful that she shared the link for a much simpler tutorial by Heather Summers over at Splitcoast Stampers.
Lastly, I added a piece of cardstock folded in half behind the bottom tier so my card would also open like a traditional card where I could add a birthday sentiment and sign our names.
Pretty much happy with how this turned out, but will definitely have to make a cutfile for this in Design Studio on my next attempt. I spent too much time measuring, and cutting and scoring (and wasting paper!) this first time around...better to let my Cricut do the cutting next time!