With small pieces of wood, screw, zinc ... the other things you do not use and some creative, cleverity then you’ll make for yourself the unique Handmade DIY Robot key rings.
This handmade chain is made from wood, spring, door’s lock.. so it’s the most creative.
Handmade Robot key rings from recycling wood.
Bike’s pump valve, attachment, wood into the unique DIY Handmade Robot key rings.
All depend on your creative.