Personalized Im Going to be a Big Sister flamingo Toddler Long Sleeve T-Shirt. Big Sister reveal announcement has two pink flamingo birds for a little girl 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.