Personalized Unicorn Donut Balloon Toddler Long Sleeve T-Shirt. Unicorn Donut Balloon! A cute unicorn soars up in the clouds in a balloon shaped like a doughnut. This is the stuff of dreams, and I don't want to wake up. 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.