Personalized Infinite Wisdom Toddler Long Sleeve T-Shirt. Math teacher infinite wisdom with the infinity symbol replacing the word infinite is a humorous gift design for your favorite mathematics teacher. 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.