Personalized Cow Over Moon 3rd Birthday Toddler Long Sleeve T-Shirt. IT'S OVER THE MOON BEING THREE 3rd birthday Toddler Long Sleeve Tee - White with happy smiling cow with balloons jumping over the moon. 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.