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.
Pebble Art of NS by Sharon Nowlan por PebbleArt en Etsy
8 by 10 This is available unframed with just a mat, ready to be framed in a standard 8 by 10 size frame. Or available with my usual dark grey frame you see in the last picture. Made with pebbles I gather myself in Nova Scotia.