Personalized I Think Therefore I Cycle Toddler Long Sleeve T-Shirt. I Think Therefore I Cycle! Those who think use their brains and make a difference in the world, and those who cycle make a difference in themselves! Great gift for your favorite deep thinker and bike riding athlete. 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.