Two summers ago, they (in a slightly different combination of people) all came to our house every day for a week and created a show together for friends and family. They had a blast and named it Pat Plane Camp.
Last summer the setting changed as we were now in a condo rather than a house with a yard and trampoline. They still spent a week together, but it was doing stuff like visiting neighborhood parks and going out to eat on Hawthorne, going to Safari Sam's, or going to a place with a bunch of inflatables to play on. They also lucked out and one family took them all to the beach overnight, as well, and stopped at Sky High on the way home. They, again, had a blast.
The schedule this summer was such that the only time everyone was in town together was on Monday. So, rather than a whole week, they had a couple of hours at Sky High. It wasn't quite the same, but it was still fun. I think they're hoping to go back to the week long format next summer, but with this group of busy kids, I guess we'll see what develops.
Here's a video I put together of their time at Sky High.