This turned out so cute. Thanks to Julie Davidson's great instructions.
Stamp sets used:
-5-1/2"x8-1/2" card base, scored at 4" and 8"
Cut two slits from 3/4" down to 4-3/4"
start 3/4" in from each score line in the center panel.
- 3-3/4"x 4-3/4" inter card stock - cut slit at 2" down to almost bottom, leaving 1/2" uncut
- 2-1/2" x 4" second inter card stock