Personalized Mechanic Skull Toddler Long Sleeve T-Shirt. Mechanic skull! An angry skull with an open end wrench and socket wrench instead of crossbones, and metal wings behind it all. Cool gift for your favorite mechanic! 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.