Yes, he has been to the new stadium to see several games. My sister-in-law (his aunt) has some connections of some sort and got some extra cool stuff for him last season.
He is in a frump right now because the Nats won the series, and now because they lost last night to the Yankees. His temperament is also affected by how well David Wright plays. But R.A. Dickey (second favorite pitcher and fourth favorite player overall) killed the Nats with the knuckleball, so that raised his spirits a bit.
It's hard being 10 years old!
I, too, went onto a boycott of baseball after the '94 strike. We had decided we didn't want to do the traditional sort of "go to the beach" honeymoon, so we had set up a west coast trip, planning to travel from San Diego to Seattle and to see games at all 6 stadiums. We got married in Virginia, got on a plane to California, and once we got there MLB went on strike. GRRRRRR......
We still had a great time and spent three weeks travelling from San Diego to Seattle. We decided we wanted to move to San Francisco based on our visit there...until we looked at the real estate listings!!!