Personalized Baby's First Cinco de Mayo Toddler Long Sleeve T-Shirt. Baby's First Cinco de Mayo apparel and gifts. Click on the tabs to choose the product, size, and color that you wish this design to be printed on. 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.