Personalized GPS Tree Toddler Long Sleeve T-Shirt. A Christmas tree decorated with GPS units is a humorous holiday gift design for your favorite geocacher or GPS user. 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.