Personalized Environmental Rocks Text Toddler Long Sleeve T-Shirt. Environmental engineering rocks in colorful musical text is a unique gift design for engineers and students at birthdays, holidays and graduation. 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.