Personalized Take a Chance: The Whatif Monster goes swimming Youth Long Sleeve T-Shirt. After learning he might enjoy trying new things, the Whatif Monster takes a leap of faith. Take a Chance: The Whatif Monster goes swimming Youth Long Sleeve T-Shirt - Heather, from "Jonathan James and the Whatif Monster" by Michelle Nelson-Schmidt. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)