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