The wickedly funny and smart “R-rated puppet show” “Avenue Q” closed in New York last May after multiple runs off and on Broadway, delighting audiences and winning Best Musical, Best Book, and Best Original Score Tony Awards in 2004. Considered by critics a “breakthrough musical” with long-term influence, the show remains shockingly fun, even for those among us who have seen it in various iterations over the years.

Children long to be grown before their time, yet adults wish to be young again is the truism at the heart of the beloved 1988 film “Big,” starring Tom Hanks, and its themes, characters and story are just as delightful 31 years later translated into the 1996 musical adaptation at The Barn Theatre where children get a peek at what it is to be grown and adults get to be children again — both on and off stage.

“The Old Man and The Old Moon” is an imaginative quest tale about, yes, an old man who has tasked himself with filling up the moon with liquid light when it begins to wane. When one night his wife tries to cash in on his promise to take her dancing and he curmudgeonly refuses, she takes off. Of course he follows, through adventures rife with storms, civil war, strange encounters in the belly of a whale, ghosts and memory, only to discover truths even larger than that which makes his wife happy.

If ever there were a terrifying piece of musical theater, it’s Stephen Sondheim’s “Sweeney Todd: The Demon Barber of Fleet Street.” Terrifying for its gruesome storyline about murder, revenge and cannibalism, yes; and terrifying for its sheer magnitude for the artists who put it together.