Yogi here, just a retired military guy seeing how long this retirement thing will last. Meanwhile, keeping occupied. I found paper models (spacecraft and rockets especially) are great entry points with local teachers to promote science and math in their classrooms. Get the kids interested and you can't hold them back. It's also a great place to display your creations - lots of viewers and you don't have to dust them. If they take a little wear and tear, it's a good reason to build another (or use my conditions - you break it, you get to build one of your own). Got started in paper last winter as an adjunct to making the $10 straw rocket launcher for a teacher workshop. Little paper rockets are much sexier (or whatever is equivalent for schoolkids) than straws. You can even launch airplanes - anything you can stick a straw into/onto. I built plastic and created a few simple paper ships many decades ago (did the dime models from the cereal boxes too), but got hooked into this after seeing what's possible at low cost and reasonable effort (started out on Jon Leslie's site - jleslie48.com - at the Lower Hudson Valley Challenger Center, very worthy work). It's a good break from carpentry - no sawdust. Most of my originals are available through Jon's web site (and a couple are out to NASA, etc to see if they'd like to use them in their outreach - the Solar Probe +, MESSENGER, and Mars Recon Observer). The lesson here is YOU can create as well as build (I ain't no Alphonso, Chris, James or Ton, so if I can do it so can you). Yogi The $10 rocket launcher: And some payloads: Or you can just do little rockets with a few strategic card washers inside to ride the launch tube: Full disclosure: OK, I really build because I love creating things. The fact I can pass them on to a good cause is just Karma-polishing.