Oh, what a beautiful thing to do for your Mother! I'm sure she will be so happy to look at it on her wall. It has a warm feeling about it.
I'm somewhat jealous because I never even get a birthday card from my DC or DGC. We always had birthday parties and such when they were growing up and are a loving family. They think a text is just as good. NOT!!
I know you're Mother is so proud of you and loves you very much!!