National Museum of the United States Air Force to geek out on airplanes with Joel all day, after taking Oliver to swim lessons and a surprisingly decent (and unsurprisingly, very large!) breakfast at Bob Evans.
Sadly the XXB-70 Valkyrie was not on display yet, but t'was all good-- the rest of the collection is superb. SR-71 Blackbird, Northrop B-2 Stealth Bomber, Lockheed Martin F-22 Raptor, plus an even more impressive collection of WW2, Korean War, Vietnam War, and Cold War-era hardware. The Smithsonian Air and Space Museum probably has better pre-WW1 and WW1 era displays, but that's picking nits-- few places are close in quality to either the Smithsonian or the National Museum of the USAF.
Back to Columbus afterwards, for a quick beer at a very nice Max and Erma's location while waiting for dinner at Schmidt's, with their German buffet. Rather simple, straightforward German food, but pretty decent nonetheless, and very popular, with over an hour's wait! Sadly the cream puff was disappointing, much more bready than I would've liked.