Personalized Big Sistersaurus with Cute Sibling Dinosaurs Toddler Long Sleeve T-Shirt. Cute sister dinosaur watches out for her little dino sibling. Adorable Toddler Long Sleeve Tee - White for any sister! 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.