Personalized Periodontist Future Toddler Long Sleeve T-Shirt. Periodontist future kids Toddler Long Sleeve Tee - White. This future kids design features colorful handprints and “when I grow up I'm gonna be a Periodontist” saying. 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.