Personalized Halloween Boo! Toddler Long Sleeve T-Shirt. These adorable dinosaurs are perfect for Halloween trick or treat! Lots of fun for the family and friends. 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.