We stayed at Circus Circus in Las Vegas after a few nights at the MGM. Adventuredome is pretty fun for the kids and us too. It's small, but not bad for an indoor theme park. They have a game arcade upstairs for kids while the adults are gambling. Plus free circus acts that kids can watch while playing games. The price is $30 a person. It's a bit hight, but I guess not bad if you plan on spending the day there. The food is really expensive.
We only stayed there because the actual room was cheap. We had 3 nights for $175. Plus is was close to the strip but not on it. I would stay there again. It's a good location and decent.