Personalized So Cute Dutch Toddler Long Sleeve T-Shirt. Toddler Long Sleeve Tee - White with the flag of Holland The Netherlands says I'M SO CUTE I MUST BE DUTCH! 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.