Personalized Whatif Monster Face Youth T-Shirt. The Whatif Monster's anxious frown has suddenly been turned upside down with Whatif Monster Face Youth T-Shirt - Kelly Green. 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. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.