This game could take 5 minutes up to an hour - depending on how much energy your little ones have. What we do is I turn on one of those digital music channels with upbeat music and let the kids dance and when I put it on mute they have to freeze. It's hilarious to see what positions they find themselves in and if they can hold it. You can turn this into musical chairs or even a clean up your toys game. If you don't have 4 or 5 kids (God bless you if you do), have your kids use their stuffed animals for the other "guests".
If you don't have those channels on your tv, just use a favorite kids CD or even the radio (I've even played this in the car, don't worry, they're just dancing in their car seats). Btw, we've borrowed a lot of cool kids CD's from the library. It's fun to try different ones every week.