Try using old CD's. I like shiny things so few years back made hanging yard mobiles from CD's. They were great and I really enjoyed them, but they seemed to keep the birds away. I like birds even more, so the mobiles went away. Then when I enlarged my turtle habitat last spring -- this was the first time for my babies to be in "the wide open spaces" -- I was afraid the kites & hawks would carry them off. So I made some CD flowers. Can't say if those worked or not, but nothing flew off with my turtles.
For the mobiles: I glued 2 CD's, back-to-back (the label sides together) and let them dry. Do as many as you want for your mobile. Drill a small hole at the top edge and one at the bottom edge of each pair (stacking them helps this go faster -- oh, and
clamp them if you stack & drill). I used mono-filiment fishing line to attach each pair to the other, placing a little fishing swivel between each (keeps the line from breaking). Use anything you want to hang them from, in any configuration that pleases you.
For the "flowers": The shiny side of the CD will face upward, randomly reflecting light,
possibly confusing bird predators (and hopefully not causing pilots to become blinded!). Don't need to glue the CD's, but need to figure out a way to fill in the center area (like the old spindle converters we used for our 45's -- oooops! Did I just date myself?) so that your wire stems are held in place. I made some "thingies" out of polymer clay that I glued on. Take some stiff, heavy wire to make "stems." Make stems any length and can vary the lengths. Stick them around so they wave & move with the wind. For mine, I drilled a little hole in the top of the rails of the turtle habitat and stuck the wire stems in the holes. Can do the same thing by twisting the wire into spring shapes, if you like the bouncy movement (actually, I think that's how I made my stems...).
If anyone does this, let me know how they work for you!