Our daughter and son (ages 7 and 5 at the time) did this Nov/03. They had a lot of fun. They watched a bit of a movie while waiting (Finding Nemo, I think) for the others to arrive. They decorated their chef's hats and aprons, and then made "Worms and dirt" (Chocolate pudding, Oreo crumbs, and gummy worms). They made individual servings, and then served them to the GF guests in the lobby.
We walked around the GF grounds, toured the shops, and then went to the cafe for tea, coffee, fruit and pastries. The waitress found out we were from Canada and told us the manager was from Canada too. So she tracked the manager down, and she came out to talk to us for a bit.
The kids loved it, and we enjoyed our 2 quiet hours as well.