Personalized Chemistry Egghead Text Youth Long Sleeve T-Shirt. Chemistry text with an egghead wearing safety glasses and holding a beaker of chemicals is a humorous design for scientists, teachers and students at back to school, birthdays, holidays and graduation. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)