Personalized What If We Have Fun? - Jonathan James and the Whatif Monster Long Sleeve 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 Long Sleeve T-Shirt - Kelly Green, from the hit children's book of the same name by Michelle Nelson-Schmidt. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL