Sing. Sing a song. Sing Out loud. Sing out strong. But most importantly, Sing Broadway!

That's what nearly two dozen young performers have been doing every weekend since Nov. 8, 1997 at Off-Broadway's John Houseman Theatre. The Broadway Kids Sing Broadway features tunes from shows like Bye Bye Birdie, The Wizard Of Oz and The Sound Of Music, sung by children who are currently, or were recently, in Broadway productions. They'll keep doing it for a long time to come, as new blocks of tickets have now gone on sale through June 21.

The show's official opening weekend was Jan. 10-12. (Kids had an opening weekend, rather than a traditional opening night, because so many cast-members alternate performances.) Presented by Eric Krebs, Sing is directed by Christopher Scott, a veteran of TheatreWorks/USA.

Folks across America got an early taste of the show when most of the cast appeared Dec. 12, on CBS-TV's holiday special, "Kathie Lee: We Need A Little Christmas." The 10 PM (EST) special featured the Kids singing along with Kathie Lee Gifford on Jerry Herman's "We Need A Little Christmas." The gig was essentially a tie-in to the Kids' latest album, "The Broadway Kids Sing Christmas," on which Gifford appears. Like the Kids' previous CDs, "The Broadway Kids Sing Broadway" and "The Broadway Kids At The Movies," "Christmas" was recorded by SugarBeat Records, released on Light Year Entertainment Records and available commercially.

Among the young cast-members in Kids are Imani Parks, who also stars in the Tarantino/Tomei Wait Until Dark and Kai Braithwaite who plays young Simba in The Lion King. When Kids first opened, Joanna Pacitti, of Annie tour renown, was also in the cast. The 8-16 year-old cast-members in Kids appear in one show per weekend, rotating throughout the open run.

For tickets ($20) and information on The Broadway Kids Sing Broadway, which plays weekend matinees at the John Houseman Theatre, call (212) 354-2220.

-- By David Lefkowitz and Christine Ehren