Everything you might want to know about eclipses!
Donate your used eclipse glasses to Astronomers Without Borders!
Find a collection point on the website linked above, or mail your glasses to:
AWB Eclipse Glasses Donation ProgramExplore Scientific
1010 S. 48th Street
Springdale, AR 72762
My Pivot Tank
Works in Progress Are:
Next On the Needles:
Then, starting at 24:40, there's a in-depth lesson about swatching.