THE BIGGEST Martin Luther King Day of Service in the nation is right here in Philadelphia, so if you haven't yet joined the record-busting 110,000 volunteers - up from 75,000 only two years ago - at the city's 1,500 projects, you can still sign up Monday, roll up your sleeves and get to work.

Todd Bernstein, founder and director of the Greater Philadelphia Martin Luther King Day of Service, said the best way to sign up for a project that still needs volunteers is to register on the MLK Day website - mlkdayofservice.org - or call 215-851-1811.

You must register online or by phone to help.

Here's a partial list of the dozens of kid-friendly MLK Day service projects that need volunteers:

* Friends of Sacks Playground needs 23 volunteers for a cleanup on Washington Avenue near 4th Street, Southwark.

* PRO-ACT needs 11 volunteers to clean up the neighborhood near the Philadelphia Recovery Community Center, Lehigh Avenue near 17th Street, North Philadelphia.

* Expressions Through Art needs 66 volunteers to clean up and paint Pepper Middle School, 84th Street near Mario Lanza Boulevard, Eastwick.

* New Calvary Baptist Church, 5th Street near Cumberland, Fairhill, needs 15 volunteers to "help renovate the church and build relationships along the way."

* North Light Community Center, Green Lane near Wilde Street, Manayunk, needs nine volunteers for housecleaning, painting and "yard work if it's not too cold outside."

* LoveLovingLove Inc. needs three volunteers to help give free Hairstyles for Hope to children in Bartram Village, 54th Street and Elmwood Avenue.

* Jewish Relief Agency, Dutton Road near Comly, Northeast Philly, needs 53 volunteers to help pack food and deliver it to struggling families.

* Art Sanctuary, 16th Street near Bainbridge, Southwest Center City, needs 23 volunteers to discuss King's "Letter from a Birmingham Jail," then create a song, poem or other form of art based on the reading.

* Urban Neighborhood Renewal Service, Woodland Avenue near 70th Street, Southwest Philadelphia, needs 56 volunteers to join a re-enactment of a civil-rights-era march. Bring civil-rights signs from the era.