Personalized 40 Super Birthday Toddler Long Sleeve T-Shirt. You're 40! Able to leap over the hill in a single bound! You may not feel like a superhero at forty, but you can look like one. Funny birthday gift for the super hero in your life. 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.