Personalized Basketball 3rd Birthday 3 Year Old Toddler Long Sleeve T-Shirt. Basketball sports ball with number three for a little boy celebrating his 3rd 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.