Personalized Whatif Monster Face Toddler Long Sleeve T-Shirt. The Whatif Monster's anxious frown has suddenly been turned upside down with Whatif Monster Face Toddler Long Sleeve Tee - Charcoal. This green furry guy is the anxious creature who slowly learns he can't live his life based on "what ifs," from the book "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.