Personalized What If It's the Best Summer Yet? Youth T-Shirt. Make every summer the "best summer" with What If It's the Best Summer Yet? Youth T-Shirt - Heather, featuring Jonathan James from "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.