Is RiffTrax Live kid friendly?
The rare exception would be if we do an R-rated movie, such as with 2013's Starship Troopers event (though we did "tame" some of the nudity with our critically-acclaimed "Gorillagrams" sketch). Our 2014 riff of Anaconda might have been a tad scary for children under 10; that movie had a PG-13 rating, and our commentary stayed within a similar vein.
If you're comfortable bringing your kids to a PG-13 movie, then we think they'll enjoy RiffTrax Live as much as you!