These remind me of mandalas. We could get stones and do mandala zendoodle art on them, and then write a simple encouraging message on the back for baby girl. Make a nice fabric bag for her to keep them in.
“I have completely fallen for you. Everything you do, everything you say, everything you are. You’re my first thought in the morning, you’re my last thought before I fall asleep, and you’re almost every thought in between.I love you