Personalized Down Syndrome Custom Toddler Long Sleeve T-Shirt. Make a personalized Down Syndrome awareness gift with our signature blue and yellow butterfly logo that you can pair with your custom name or quote on a Toddler Long Sleeve Tee - White. 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.