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.
Pallet Patio Furniture: So easy! Stack pallets, nail together, paint, cover crib mattress in weatherproof material and you're done! If you're feeling creative, cut a pallet in half and secure for a backrest.