Yes, they are literally blue men, and they are worth seeing at least once. Their high-octane theatrical experience — during which the group doesn’t speak — will surround you in an explosion of comedy, music and technology, but that’s about as specific as any description of the Blue Man show gets because, as the group’s own website says, the performance is impossible to describe.
You’ve just got to go see it.
Details: Noon, 4 and 8 p.m. Saturday; 1 and 5 p.m. Sunday. $33-$77. 701 W. Riverside Drive. thelongcenter.org.