Personalized George Is Not Playing Around Long Sleeve T-Shirt. This cynical penguin doesn't know that using your imagination can be fun! George Is Not Playing Around Long Sleeve T-Shirt - White, for the George fans out there. From the book "Bob is a Unicorn" 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