Personalized San Diego Vacation Trip Toddler Long Sleeve T-Shirt. Fun palm tree design for San Diego CA is a great vacation souvenir or gift idea. 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.