Personalized Whatif Toddler Long Sleeve T-Shirt. He's anxious, he's pessimistic, he's doubtful, but he's oh-so cute. Whatif Toddler Long Sleeve Tee - Red, from "Jonathan James and the Whatif Monster" by Michelle Nelson-Schmidt. A classic for Fall, Winter and Spring, these long sleeve toddler t-shirts are sure to be a staple in your child's wardrobe. Whether layered or alone, this t-shirt is soft yet durable enough to stand up to your toddler's playtime demands.