The above is a link to RevQuest a spy game for travelers to Colonial Williamsburg for ages 8 and up. You have to do a game online and recruit 3 patriots to the cause. Then with a paid admission ticket you continue the game when you get to Williamsburg. You can get special souveniers too, they say.
We haven't been to CW yet, but have done the preliminary work and have found the 3 patriots, and are looking forward to playing in September.
They say it takes about 2 hours to go through the whole game but you can do it in stages.