Personalized Basketball 1st Birthday 1 Year Old Toddler Long Sleeve T-Shirt. Basketball sports ball with number 1 for a little boy celebrating his first 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.