Personalized Big Sis Girls Sister Announcement Toddler Long Sleeve T-Shirt. Cute owl with Big Sis quote for a girl who has a new baby joining the family. 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.