L.C.
You got some great ideas! Some other games that I've played are: if you have one of those plastic pools or sand box, you could do a fossil dig. Hide small objects (ie: dinosaurs, cute erasers, etc...) and have the kids dig for them. Let them keep the "fossils" they find.
Also, I've done this "fear Factor" style game which would be good for the 5+ kid: have them eat gummy worms w/out using hands.
And...balloon toss ~ everyone can get involved!
Have fun!
A little bit about me: Author of book Imagine...Amazing Me! Mom of 3 great kids (9, 5, and 3) and married for just about 15 yrs!