If you are not aware what it is check it out here -
http://www.usfirst.org/
This is my first year mentoring for my local group and it has been great. Their first meeting this year I did a presentation on 3D printing and rapid prototyping it blew their minds. Having to build a robot from scratch in 6 weeks works perfect with rapid prototyping.
I would highly suggest taking a look and seeing if there is a group in your area. It is the absolute perfect opportunity to educate others on 3D printer, while giving them the chance to utilize the concept as well.