The Hungarian Parliament building is one of the top sights in Budapest. It is a beautiful building on the inside and out. We had not toured it, so while my parents were here the kids and I took a tour with the building with them.
There are only a few English language tours each day. We arrived about 9:15 and got in a line. The guard let one or two people at a time pass a barrier to go to the ticket office. At the ticket office, you received a tour time after showing your passport. We received tickets for a 12:45 tour, the first available. We didn't have time to go back home for long, so we let the kids play and ate lunch while we waited for our time.
Once it was finally tour time, we passed through metal detectors, etc before ending up in the lobby of Parliament.