I love this. It turned out so cute and I love the green! You can purchase do it yourself iron on decals in my etsy shop. Here is a link to THIS one.
Did you know that you could use a regular household iron to permanently apply Siser Heat Transfer Vinyl? Maybe you can't with other materials, but Siser heat transfer vinyl goes on easily and stays in place - wash after wash! Siser is what we use at The Vinyl Express. This video from SiserNA shows you how!