Personalized 1st Birthday 1 Year Old Girls Rainbow Star Toddler Long Sleeve T-Shirt. Cute rainbow starburst with pink number 1 on a Toddler Long Sleeve Tee - Charcoal for celebrating a little girl's 1st 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.