My 10 yo NT DS is all about history. We have gone to St augustine for a week and he loved the old jail, the old fort, the old general store, the fountain of youth,etc. My ASD 13 yo DS not so much. While in the old jail he was jumping and flapping, I had to take him outside while DH and other DS continued the guided tour. In the old general store ASD DS was trying to touch everything. DH had to take him outside while I continued the tour with my other DS. It was pretty much a flop vacation for me and DH, but my 10 yo old loved it. We really want to take him to Washington, but I just don't see ASD son getting any enjoyment from walking around looking at monuments and museums. If we take DS 10 to Washington, its something that both DH and I want to experience with him, but I just don't see how we can. Last year we went to the Naval Aviation museum in Pensacola, similar to the Air and Space museum in DC. It held ASD sons interest for 5 minutes, so I got stuck holding his hand and trying to keep him calm while DH and other DS looked at the exhibits, we wound up sitting on a bench watching G-Force on his Ipad for the 13 millionth time. I didn't enjoy myself, DH felt like he had to rush an all day museum into an hour. Another flop. But again DS 10 loved it. Any advice?