Personalized Gym Is Great Toddler Long Sleeve T-Shirt. Gym is great. It's better than chocolate cake in rough text with a slice of cake is a funny distressed design to brighten the day of gym teachers, body builders, athletes and fitness gurus. 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.