RADical Days will return for the seventh year Sept. 20, with 39 arts and cultural organizations funded by the Allegheny Regional Asset District (RAD) offering free performances and admissions over a nearly three-week period. Also during that time, many Allegheny County public libraries will host RADical Days activities (visit aclarad.eventkeeper.com for the full schedule).

Reservations for advance-ticket events begin today. For details, information and restrictions, go to www.radworkshere.org and click on RADical Days in the "What's Happening" section.

2008 RADical Days schedule:

SEPT. 20

• American Jewish Museum of the JCC, 6:45 a.m.-9:30 p.m. (collaborate with artist Ally Reeves, 1-3 p.m.)

• Pittsburgh Symphony Orchestra, 11 a.m.-noon (reserve advance tickets at the box office or call 412-392-4900)

SEPT. 21

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

• Venture Outdoors, 10 a.m.-dusk (Kayak Pittsburgh Downtown; must be at least 3 years old)

• RiverQuest (dockside tours of the new green education boat Explorer), 11 a.m.-3 p.m.

• Carnegie Library of Pittsburgh (Main) presents: The Prose of Sharon F. McDermott and Barbara Edelman, 2-3 p.m.

SEPT. 22

• American Jewish Museum of the JCC, 6:45 a.m.-9:30 p.m. (Ally Reeves, 1-3 p.m.)

• Allegheny-Kiski Valley Historical Society, noon-3 p.m.

SEPT. 24

• American Jewish Museum of the JCC, 6:45 a.m.-9:30 p.m. (Ally Reeves, 1-3 p.m.)

• Allegheny-Kiski Valley Historical Society, noon-3 p.m.

SEPT. 25

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

SEPT. 26

• PNC Park (tours only), 10 a.m.-3 p.m.; last tour at 2 p.m.

• Allegheny-Kiski Valley Historical Society, noon-3 p.m.

SEPT. 27

• Audubon Society of Western Pennsylvania's AppleJamm celebration, 10 a.m.-4 p.m.

• WQED-FM's Carolyn M. Byham Studio (tours), 11 a.m.-2 p.m.

SEPT. 30

• David L. Lawrence Convention Center (tours), 10 a.m.-3 p.m. (reserve times at 412-565-6000)

OCT. 1

• Heinz Field (tours), 10 a.m.-3 p.m.; last tour at 3 p.m.

OCT. 2

• Phipps Conservatory and Botanical Gardens, 9:30 a.m.-5 p.m.

• Soldiers & Sailors National Military Museum presents the U.S. Marine Band, 7:30 p.m. (request advance tickets at 412-621-4253)

OCT. 3

• Pittsburgh Glass Center, 10 a.m.-9 p.m. (demonstrations plus evening opening reception for new exhibition)

• Soldiers & Sailors Museum, 10 a.m.-4 p.m.

• August Wilson Center for African American Culture, 5:30-9 p.m. (multimedia presentations at construction site)

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

• Pittsburgh Filmmakers, 7:30 and 9:30 p.m. (separate screenings from the Ann Arbor Film Festival)

• Attack Theatre, 8-11 p.m.; performances at 9 and 10 p.m.

OCT. 4

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

• Sen. John Heinz History Center, 10 a.m.-5 p.m. (performances by Bulgarian Folk Ensemble; activities with other regional assets)

• Society for Contemporary Craft, 10 a.m.-5 p.m. (wood-turning and paper-bag book activity)

• Pittsburgh Opera Open House, 10:30 a.m.-3:30 p.m.

• WQED-FM's Carolyn M. Byham Studio (tours), 11 a.m.-2 p.m. (Marvin Hamlisch, noon-1 p.m.)

• Silver Eye Center for Photography, 11 a.m.-5 p.m.

• Mellon Arena (tours, skating, watch Pens live from Sweden), noon-5 p.m. (skating and admissions restrictions; visit mellonarena.com for details)

• Pittsburgh Filmmakers, 7:30 and 9:30 p.m. (separate screenings from Ann Arbor Film Festival)

OCT. 5

• Frick Art & Historical Center, 10 a.m.-5 p.m. (scavenger hunt for kids and take-home art activities)

• Pittsburgh Center for the Arts, 10 a.m.-5 p.m. ("Clay Olympics")

• Carnegie Museums of Art and Natural History, noon-5 p.m. (performances by Children's Festival Chorus, Kuntu Repertory Theatre and students from the Pittsburgh CLO Academy of Musical Theater)

• Kelly-Strayhorn Theater: An Evening of "RADical" Music, 7-8:30 p.m. (includes Bach Choir of Pittsburgh's cabaret group Love Knots and Opera Theatre of Pittsburgh)

NORTH SIDE 'CHARM BRACELET' ASSETS OCT. 5

• National Aviary, 9 a.m.-5 p.m.

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

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

• Children's Museum of Pittsburgh, noon-5 p.m. (performances by Pittsburgh Youth Ballet and Saltworks Theatre)

• Mattress Factory, noon-5 p.m.

• Venture Outdoors, 1-5 p.m. (kayaking on Lake Elizabeth; must be at least 3 years old, other restrictions)

• New Hazlett Theater and Prime Stage Theater, 2:15 p.m. (performance of "The Hound of the Baskervilles"; limited to 175 seats; best for age 12 and older)

OCT. 10

• Soldiers & Sailors National Museum, 10 a.m.-4 p.m.

OCT. 11

• Venture Outdoors, 10 a.m.-dusk (kayaking at North Park Lake; must be at least 3 years old)

• Allegheny County Parks Hay Day at Hartwood Acres, noon-4 p.m.

OCT. 12

• Pittsburgh Zoo & PPG Aquarium, 9 a.m.-5 p.m.; gates close at 3:30 p.m. (performances by Pittsburgh Musical Theater X-Treme Teen Broadway and Pittsburgh CLO; demonstrations by Dance Alloy Theater)

• Pittsburgh Center for the Arts, 10 a.m.-5 p.m.

• Carnegie Library of Pittsburgh (Main) presents Slim Forsythe & the Parklane Drifters, 2-3 p.m.

OCT. 17

• Soldiers & Sailors Museum, 10 a.m.-4 p.m.

OCT. 25

• Carnegie Library of Pittsburgh Hill District Library Opening, 10 a.m.-3 p.m.