Personalized Chemical Eggineer Toddler Long Sleeve T-Shirt. Eggineers are engineering eggheads and this humorous egghead with safety glasses and beaker of chemicals and the text chemical eggineer, is a fun gift design for 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.