Personalized 5th Birthday Submarine Party Toddler Long Sleeve T-Shirt. 5th Birthday cute colorful submarine with number 5 on a Toddler Long Sleeve Tee - White party day gift. 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.