Personalized Environmental Engineer Gamer Youth T-Shirt. Environmental Engineer I fight zombies in my spare time is a funny gift design for engineering gamers at birthdays, holidays and graduation. What would this world be like without them? 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.