We'll be visiting Washington DC with two children aged 4yrs and 6yrs in July en route back from Williamsburg and taking off at the Dulles airport. We'll only be there one full day. We've made reservations at the Quality Hotel COurthouse Plaza. Any reviews? We'll be driving in, and the hotel provides free parking and appears close to metro stations. Any suggestions as to what would be good for the kids to see/do? Any comments on the Old Town Trolley or the Tourmobile? Thanks!