Personalized Robot 4th Birthday Toddler Long Sleeve T-Shirt. Robot 4th Birthday - A cute little robot wearing a birthday hat celebrates your little four year old's fourth birthday. 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.