The BBC has a good
website with some webquests – I haven’t done them all but some of them may not
be entirely suitable (too old / young) but may be worth a look http://www.bbc.co.uk/history/interactive/games/
Also, they have lots
of games and online programs here http://www.bbc.co.uk/history/forkids/
More interactivity!
http://www.bbc.co.uk/history/interactive/
Videos and audio
clips (check them out first)! http://www.bbc.co.uk/history/interactive/audio_video/
