Personalized Big Brother Shark Toddler Long Sleeve T-Shirt. Big brother shark! Shark teeth have taken a bite or two out of the letters, but a big brother is tougher than the shark. Cute gift for any big bro! 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.