Personalized George Is Not Playing Around Toddler Long Sleeve T-Shirt. This cynical penguin doesn't know that using your imagination can be fun! George Is Not Playing Around Toddler Long Sleeve Tee - Heather, for the George fans out there. From the book "Bob is a Unicorn" by Michelle Nelson-Schmidt. A classic for Fall, Winter and Spring, these long sleeve toddler t-shirts are sure to be a staple in your child's wardrobe. Whether layered or alone, this t-shirt is soft yet durable enough to stand up to your toddler's playtime demands.