― Design your own Custom Birthday Shirt and have a chance to save 25% on your child's shirt if you decide to purchase. Looking for that perfect shirt to match your child's party theme? Look through my birthday shirts and bib section in my Etsy shop. If you don't see the theme you are looking for, contact me and I will help you create the perfect shirt to match your child's party theme. If it is a theme that is not already found in my Etsy shop, you could be eligible for 25% off of your shirt [...].