Personalized Chemical Engineer Zombie Fighter Toddler Long Sleeve T-Shirt. Chemical Engineer I fight zombies in my spare time is a humorous gift design for engineering zombie terminators. What would this world be like without them? 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.