Personalized Gym Teacher Sneakers Toddler Long Sleeve T-Shirt. Gym Teacher with the word Gym wearing sneakers is a humorous design to make your favorite gym teacher smile on birthdays, holidays, graduations and back to school. 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.