I made a mobile out of this set from Amazon and some sewing rings from Hobby Lobby.

46 PCS Antique Bronze Vintage Skeleton Keys Charms Potter Flying Keys Enchanted Key With 50 Pairs Dragonfly Wings and 105 Yards Fishing Line For Jewelry Making Necklace Crafts https://www.amazon.com/dp/B0832XG7TB/ref=cm_sw_r_cp_api_i_4CAS59ZMTVPFH8P4G3PK

Lots of good ideas on Pinterest if you or your wife are crafty. Also lots of artwork on Etsy.