Personalized Wavy Swim Toddler Long Sleeve T-Shirt. Swim in wavy blue text is a fun gift design for swimmers and swim coaches for back to school, birthdays, holidays and swim season. 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.