1) Become a certified emergency medical responder. It's a one semester course you can take at your local community college. It's the first step to becoming an EMT if you want to keep going. You learn things including CPR, wound management, dealing with broken bones, heart attacks, car accidents, transporting patients, even emergency childbirth. I enjoyed the class immensely. Now I'm a lot less afraid of medical disasters because I have a plan and an impressive first aid kit, and I know how to use it.
2. Become an amature radio operator. As a technologist, it's fun to get in touch with my roots using older technology. I've been working on being able to operate using battery and solar panels, which has been a blast to learn about and experiment with. I can also operate portably while camping, bouncing waves off the atmosphere and back either towards the horizon to talk thousands of miles away, or straight up towards space and reflecting off the atmosphere back down to talk within a 300 mile range (this is called NVIS). Learning and practicing these skills is awesome fun.
3. Camping, and having the food water and equipment in hand to camp for several days. We have a few 7 gallon water tanks we use for camping which we keep full, in addition to our always evolving camping supplies. We take frequent camping trips.
Doing these things is educational, challenging, enriching and fun! I encourage everyone to do it.
It's also worth noting that you can get a ham radio for $40 that's higher power and will work at longer range than the FRS/GMRS radios. The FCC limits FRS radios to half a watt, and ham radios don't have that limit.