Personalized 1st Birthday Owl Toddler Long Sleeve T-Shirt. The Happy Owl Me design is ideal for parents looking for 1st birthday party ideas. The cute cartoon owl and vibrant colors will create a fun and festive atmosphere for your little girl's big day. This design is perfect for invitations, decorations, and thank you cards, making it easy to coordinate all aspects of the celebration. 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.