Trim a piece of white card stock to 10.5″x 4″, fold it in half, and glue it inside of the card base.
Make a pop-up cube: size (1″x 2.5″)
Sentiment in the front of the card, using the Winter has come to Town stamp, Silver heat embossing it. attach it on the front of the card with a foam sticker.
Attach the pop-up cube on the back of the Santa, and glue it on the inner card.