Does you son enjoy outdoor activities? If so, this is a great area for them.
There are a bunch of climbing gyms in the area. I recommend
Earth Treks and
Sport Rock. Both have indoor and outdoor classes for kids and teens. I can not, however particularly recommend any of the instructional groups not affiliated with those gyms.
For boating, try renting from
Jack's or
Fletcher's boathouses. Both have canoes and Kayaks. At Fletcher's, you can choose to boat on the canal in a kayak, canoe, or rowboat or you can take the to Potomac in a canoe or kayak.
This is a great area for biking. If you're looking for tails other than the Capital Crescent, Mount Vernon, and Beech Drive, go to any
REI store to get some inexpensive guidebooks for the local area.
Hiking opportunities are also plentiful. Again, I would recommend REI as a good place to get set up with guidebooks. In some cases, you have to drive an hour or two to get to the trailhead, but if your son will tolerate it, that time is a good way to get caught up with each other.
This is a great time of year for corn mazes and harvest festivals. Some are geared toward younger kids, but the Leesburg maze at Temple Hall Farm (
Welcome to The MAiZE at Temple Hall Farm Regional Park (http://www.nvrpa.org/parks/themaize/ - broken link)) is a blast for all ages. (My husband and I try to go every year.) For other seasonal ideas, check out the Washington Post. Either grab the Weekend section from the Friday paper or go to the Going Out Guide online (
Restaurants, Bars, Events in DC, MD and VA on washingtonpost.com) and search "kid friendly." The search term does include activities designed for small children, but also includes all-ages activities during the day that don't involve alcohol or adult themes.
Your son is also at a good age to get involved in community service. I know that the Capitol Area Food Bank, along with a lot of other organizations always need volunteers. Often food banks do not require a regular commitment.
Lastly, I've always loved the Spy Museum. Not everyone's the museum type, though. I hear that the Newseum also has a lot of interactive displays that hold the interest of children and adults alike.