Those impish wags from [title of show] are back to their meta-theatrical tricks in their new, similarly whimsically titled new musical. Starring Hunter Bell, Susan Blackwell, Heidi Blickenstaff and Jeff Bowen—all of whom collaborated on its development—Now.Here.This. demonstrates that this quartet haven’t lost their fascination with…themselves.

While their first show was all about its own creation, this effort is more personal, resembling a confessional musical therapy session. It’s loosely structured around an outing to the Museum of Natural History, which naturally gets the characters—Hunter, Susan, Heidi and Jeff, and you can probably guess who plays who—to thinking about…themselves.

This new work, which has a title inspired by a maxim by philosopher Thomas Merton, begins deceptively, with a song about the birth of the planet. But such cosmic concerns are soon abandoned, as the performers proceed to deliver comic riffs and musical numbers ostensibly inspired by the museum’s anthropological exhibits (“Did you know that a collective of turtles is called a ‘bale’ of turtles?”) but that really hinge on their personal lives. The details of which will not be forthcoming here, mostly because the utter triviality of the material tends to make it disappear quickly from memory. I do vaguely recall a lengthy discussion of the reason why Tootsie is the greatest American film comedy of all time, but that’s mainly because it made me want to exit the theater immediately and rent it.

The endless self-absorption on display can perhaps by best illustrated by the aptly titled number “Give Me Your Attention,” in which Blickenstaff sings of desperately trying to earn her family’s approval as a child. It’s time to get over it, already.

The performers try very, very hard to be engaging and likeable, and they sometimes manage to succeed in spite of themselves. Director/choreographer Michael Berresse has provided a suitably casual seeming staging, and some of the numbers, such as “Then Comes You,” are sweetly melodic. But there’s clearly something wrong when you leave a musical not humming the songs, but rather wishing you could hear more of Roger Rees’ mellifluous voice-overs.

Vineyard Theatre, 108 E. 15th St. 212-353-0303. www.vineyardtheatre.org.