Donate money directly to classrooms that need funding for science projects.
It looks like blogs, along with their “vassal” blogs, compete against each other to see who can rally the most financial support.
Each classroom has a description of what their project needs are, as well as their relative poverty level. Pick one, donate, finish!
Personally, I find the spectral analysis and bio themed ones particularly noteworthy. I recall “electric cars” in middle school being utterly worthless. But I figure microscopes will attract kids’ attention even if they don’t understand what’s going on. “Hey look! It’s a little moving blob! And they’re everywhere!”
From there, they can learn all about anthrax, ebola, biological warfare, etc. etc. I kid, I kid.