Personalized 1st Birthday Superhero Toddler Long Sleeve T-Shirt. It's a comic book 1st birthday party. Cool, wow, your little one is a superhero! 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.