Personalized I'm Four Nomenal Toddler Long Sleeve T-Shirt. I'm Four Nomenal! Pow! Wow! Fourth birthday comic book style for your phenomenal little superhero. Great 4th birthday present. 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.