Personalized Little Sister Flower Toddler Long Sleeve T-Shirt. Sweet pink flower with Lil Sis kids slogan for little girls on a little sister Toddler Long Sleeve Tee - Kelly Green. Flower art by Ne' Metzger. 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.