Personalized To Thine Own Self Be True Shakespeare Toddler Long Sleeve T-Shirt. Shakespeare quote Toddler Long Sleeve Tee - White says This above all, to thine own self be true, from Hamlet. 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.