Personalized Whatif Monster I'm Sweeter Than I Seem Youth Long Sleeve T-Shirt. He may be anxious, and a little bit pessimistic, but he sure is sweet! Whatif Monster I'm Sweeter Than I Seem Youth Long Sleeve T-Shirt - White, from the children's book "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)