My first thought on seeing your disk negatives was "Wow. I wonder how many members here remember this stuff?!" My next thought was to suggest that you inform your children of what you've found then try to rig up some means to scan the negs because it's almost a certainty that the images will have some sentimental value not only for your kids, but maybe even for you, too!

What an intriguing cloud-scape! ...Nicely captured. Makes me curious about seeing any other images from this moment to dive deeper into the experience.

@aschweik: Very creative! I really like this polarized backlighting technique. I've made several images similar to this.
One Example:
https://www.flickr.com/photos/58556028@N00/7836231934

@Tdearing: Thank you for your compliment.

Circles. [first post]

(Download)