Personalized 3rd Birthday Frog Toddler Long Sleeve T-Shirt. Happy little frog is celebrating his third birthday! Cute 3rd birthday present for the three 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.