Personalized Nano Eggineer Toddler Long Sleeve T-Shirt. Eggineers are engineering eggheads and this humorous egghead with a magnifying glass and nano eggineer text will tickle the funny bone of your engineer at birthdays, holidays and graduation. 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.