Personalized Big Brother Muscles Toddler Long Sleeve T-Shirt. Big Brother! Protects his little siblings from all the bad stuff in the world. Great gift for your little hero! 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.