Local arts and cultural organizations have opened their doors for a series of free events in recent years, their way of saying thank you for the public support they get through the 1 percent Allegheny Regional Asset District (RAD) tax.

RADical Days, in its sixth year, launches today and runs through Oct. 7, with a Pittsburgh Cultural District gallery crawl on Oct. 19.

Organizations that receive RAD funding will present music, dance and theater performances, tours, family activities, plus free admission on designated days to attractions such as Pittsburgh Zoo & PPG Aquarium, Carnegie Science Center and more. Several libraries throughout the county are presenting storytelling and puppet shows.

More than 150,000 people have visited RADical Days events in the past six years, with more than 36,000 taking advantage of the free events last year.

RADical Days 2007 schedule

Sept. 25

American Jewish Museum of the JCC, 6:45 a.m.-9:30 p.m.

Attack Theatre open rehearsal, 2-4 p.m. and 6-8 p.m.

Mellon Arena Family Skate (restrictions apply) plus locker room tours, 6-9 p.m.

Sept. 26

Allegheny-Kiski Valley Heritage Museum, noon-3 p.m.

Attack Theatre open rehearsal, 2-4 p.m. and 6-8 p.m.

Sept. 27

"MCG Jazz: Jazz Insights" with James Moody, a pre-concert talk at the Manchester Craftsmen's Guild, 6:45-7:30 p.m.

Sept. 28

Allegheny-Kiski Valley Heritage Museum, noon-3 p.m.

Sept. 29

Bulgarian Cultural Center, 9 a.m.-3 p.m.

Carnegie Museum of Art (Children's Festival Chorus and UMOJA perform), 10 a.m.-5 p.m.

Carnegie Museum of Natural History, 10 a.m.-5 p.m.

Soldiers and Sailors National Military Museum, 10 a.m.-4 p.m.

WQED-FM: Cultural District Studio Tour, noon-3 p.m.

Rising Stars of Pittsburgh Opera (reserve tickets: 412-281-0912 or www.pittsburghopera.org.), 7 p.m.

Sept. 30

National Aviary, 9 a.m.-5 p.m.

The Andy Warhol Museum, 10 a.m.-5 p.m.

Carnegie Science Center, 10 a.m.-5 p.m.

Sen. John Heinz History Center (Kuntu Repertory Theatre, Pittsburgh Civic Orchestra, UMOJA African Arts perform), 10 a.m.-5 p.m.

Artists Image Resource, 11 a.m.-4 p.m.

Children's Museum of Pittsburgh (performance by Gemini Theater Company and Pittsburgh Musical Theater Stars), noon-5 p.m.

Mattress Factory, noon-5 p.m.

New Hazlett Theater (music, refreshments, activities), noon-4 p.m.

"MCG Jazz: Jazz Insights" with James Moody, a pre-concert talk at the Manchester Craftsmen's Guild, 1:45-2:30 p.m.

Oct. 1

Allegheny-Kiski Valley Heritage Museum, noon-3 p.m.

Phipps Conservatory and Botanical Gardens (guests limited on the hour, admission closes at 4 p.m.), 9:30 a.m.-5 p.m.

Oct. 2

American Jewish Museum of the JCC, 6:45 a.m.-9:30 p.m.

Oct. 3

Allegheny-Kiski Valley Heritage Museum, noon-3 p.m.

Heinz Field (tours on the hour; limit 50 guests per tour; first come-first served, 10 a.m.-4 p.m.)

Oct. 5

Pittsburgh Glass Center, 10 a.m.-9 p.m.

PNC Park (tours on the hour; limit 60 guests per tour; first come-first served), 10 a.m.-3 p.m.

Allegheny-Kiski Valley Heritage Museum, noon-3 p.m.

August Wilson Center's 209/9 Gallery (includes evening reception), noon-8 p.m.

Oct. 5-6

Pittsburgh Filmmakers' Melwood Screening Room (programs from the Ann Arbor Film Festival Touring Show, 7:30 p.m.

Oct. 6

Pittsburgh Zoo & PPG Aquarium (performances by The Pittsburgh Philharmonic, Saltworks Theatre Company and UMOJA African Arts; gates close at 4), 9 a.m.-5 p.m.

Society for Contemporary Craft, 10 a.m.-5 p.m.

Pittsburgh Symphony Orchestra Concert (reserve tickets at 412-392-4900), 11 a.m.-noon.

WQED-FM: Cultural District Studio Tour, noon-3 p.m.

Meet PSO Pops Conductor Marvin Hamlisch, noon-1 p.m..

Allegheny County Parks: Hartwood Acres Hay Days, noon-4 p.m.

August Wilson Center's 209/9 Gallery, noon-5 p.m.

Oct. 7

Frick Art & Historical Center, 10 a.m.-5 p.m.

Carnegie Library of Pittsburgh-Main presents The Poorhouse Singers, 2-3 p.m.

Kelly-Strayhorn Theater: RADical Dance and Music (Bulgarian Culture Center dancers, LABCO Dance, South Hills Chorale and UMOJA African Arts), 7-8:30 p.m.

Oct. 19

Pittsburgh Cultural Trust: Gallery Crawl, 5:30-9 p.m.