Personalized Beam Stockings Toddler Long Sleeve T-Shirt. An I Beam with Christmas stockings hanging from it is a humorous structural steel design for engineers, steel detailers, fabricators and construction workers at holiday time. 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.