Personalized Nanotechnology Huge Toddler Long Sleeve T-Shirt. Nanotechnology is huge text and an egghead with a magnifying glass is a funny gift design at birthdays, graduation or holidays for engineers, technicians and scientists. 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.