Goldstar, an online ticket discounter, is offering half price tickets for Mythbusters: Behind the Myths at the Orleans Arena on Saturday June 21st at 7pm. Regular tickets are $53.79-$80.55.  Through Goldstar they are $25-$40.
I saw the show at the Venetian a few years ago and highly recommend it for fans of the show. They do a few experiments, tell a few behind the scenes tales and have a lot of audience interaction. It is very family friendly.

You must create a free Goldstar account to get the discounted tickets. Click here for more info.