Personalized Little Brother Astronaut Toddler Long Sleeve T-Shirt. Little Brother Astronaut is floating out in space and has grabbed on to a bright star. Cute gift for any little 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.