Personalized 4th Birthday Kitten Toddler Long Sleeve T-Shirt. A cute cat in a suit and hat smiles as it celebrates a fourth birthday for the happy 4 year old! 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.