Personalized Whatif I Love to Swim with Whatif Monster Toddler Dress. Take a dip with the Whatif Monster! Whatif I Love to Swim with Whatif Monster Toddler Dress - Natural with Stripes, from the hit children's book, "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!