Personalized Whatif Monster Birthday Girl Toddler Dress. There's no day like your birthday, so why not try something new? Whatif Monster Birthday Girl Toddler Dress - Natural with Stripes, perfect for little fans of "Jonathan James and the Whatif Monster" by Michelle Nelson-Schmidt. Your little one will be adorable and comfortable in this 100% combed ringspun cotton 1x1 baby rib dress!