Well,
I’m 75 and still alive. Born January 5, 1945.
Now, allowing that anything goes for this challenge, what I am presenting is a system for mounting origami on Mouse Ears. What else would I do when I am 75. I am going to Disney World with my Grand Daughters.
This system is made with folded metal flashing (Aluminum). The ears are attached with a bolt. All origami inside the ears is folded paper and can be removed without damage. With one exception (designed by Jeremy Shafer) all designs are my original design which have been modified to fit in the Mouse Ears Frame and is folded from rectangles.
Made from one piece of paper with no cuts. This piece is designed to capture childhood day dreams of water breaking into ripples from the hull of a sailing boat.
Rule clarification. I made this 12 piece version for the first time on the 21/1/2020 and have just discovered what you can see above, however the unit I made over a year ago so this may not be a valid entry.
This is how I am practicing for the Disney World rides when I go with my Grandchildren.
Disney is know for using Green technology. I think my version beats the Triceratops Spin because my version is entirely wind powered (and I used green paper).
Folded from two 14 x 14 cm (5 ½ x 5 ½ in) squares of duococolor paper. I made it as part of Leyla Torre's course "The Joy of Origami". You can see it here connected to a model she designed: viewtopic.php?f=15&t=14951#p152425
But I'm presenting it for the challenge with a different look, which I came up with by myself. And here's a picture of just the purple/yellow sheet: