I used this tutorial for the diaper babies http://phar-ma.com/diaper-babiesthe-details/ and this is one of the youtube videos I watched for the carriage https://www.youtube.com/watch?v=0J9bCtSBqaE
I used a rubberband to hold the rolled up diapers together and then hot glued them to the shoe box. I really wanted to diapers to be reusable, but tape just didn't hold up. This is purely for looks! Enjoy!