Personalized Traffic Eggineer Youth T-Shirt. Eggineers are engineering eggheads and this humorous traffic eggineer with a traffic light, a hard hat sporting a road and directional text will bring a smile to your engineer on birthdays, holidays, and graduation. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.