Personalized Sweet Sixteen SS Toddler Long Sleeve T-Shirt. Sweet 16th birthday Toddler Long Sleeve Tee - White with 2 pink S's that make a pretty heart, a cute pink flower and text that says SWEET SIXTEEN. 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.