Personalized What If We Have Fun? - Jonathan James and the Whatif Monster Youth T-Shirt. What if it's not as scary as you thought? What if you like it? What if We Have Fun? - Jonathan James and the Whatif Monster Youth T-Shirt - Kelly Green, from the hit children's book of the same name 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.