Personalized Irish Light Toddler Long Sleeve T-Shirt. You don't have to be Irish to be green text with the picture of an energy saving light bulb is a funny gift design for the energy conserving on St. Patrick's Day and Celtic events. 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.