Here's another fun little shaker card. I had my Cricut write the sentiment on the inside panel so that it would show through the window on the front of the card. I went with a happy greeting so I could send this card at any time to anyone just to brighten up their day.
I've added notes to the file showing which layer is for the foam and which is for the acetate. I did a sandwich of acetate, foam, acetate for the window and added my shaker bits before gluing down the back piece of acetate. I then assembled the 2 front panels, the window "frame", and the heart embellishment and then glued my sandwich to the reverse side. Now just glue it all down to the front of the card base and then add your sentiment layer to the inside and you're done.
You can grab the Cricut Design Space file from here.