Personalized Astronut Toddler Long Sleeve T-Shirt. Astro Nut text and an acorn critter attached to a space ship is a humorous play on the word astronaut. 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.