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.
rock garden DIY Rock Cactus Garden- this if for those self declared Brown-Thumbs out there! We saw this & thought they were cute! This would be a fun project to do with the little kids, gather a few rocks on your next outing.