Personalized Imagination Is Magical Youth Long Sleeve T-Shirt. With a little bit of imagination, you can be or do anything you wish. Imagination Is Magical Youth Long Sleeve T-Shirt - Heather, featuring Bob from the children's book "Bob is a Unicorn" by Michelle Nelson-Schmidt. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)