After seeing these cards around, I finally tried making one!  Just use your Big Shot and Scallop Circle Die #113468!  Use a piece of card stock or designer paper (I used a retired paper). Actually I used Whisper White for the card base and also the designer paper so I would have a white inside.  Cut your paper twice as large as the scallop on the die and fold in half.  Place the fold just inside the scallop edge, omitting about 4 scallops. When you do it, you'll see.  After the scallop is cut, you will need to make your own template, but basically you are just going to cut into the middle of the scallop from the open edge and cut out a section to make it look like a baby carriage.  Then decorate away!