RADical Days kick off on Sunday and continue through Oct. 24, with 41 free admission sites, new performances and activities, and a first-ever 24-hour event Oct. 23-24.

Also new this year, RADical Days enthusiasts can get event reminders via their mobile devices. RAD has partnered with Pittsburgh-based technology company SMASH to bring RAD information via mobile messaging to interested users. Text RAD to SMASH (76274) to get RADical Days alerts, as well as weekly arts and culture updates about the assets through the year. There is no charge from RAD to receive text message alerts; however, users' standard message and data rates may apply.

Now in its ninth year, RADical Days feature free admission and special events offered by arts and culture organizations funded in part by the Allegheny Regional Asset District (RAD).

Go to www.radworkshere.org for the full schedule and additional site information, details and restrictions. Click on RADical Days in the "What's Happening" section.

Here's what's happening the first week of RADical Days:

• Pittsburgh Penguins Training Camp at Consol Energy Center 9 a.m.-1:30 p.m.

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

• RiverQuest 11 a.m.-3 p.m.

• Attack Theatre Presents "Site/Re-Site," a working rehearsal (rolling admission) 1-5 p.m.

• WYEP's Final Fridays at Schenley Plaza with Backyard Tire Fire 7 p.m.

• Pittsburgh Opera "Rising Stars" concert 6 p.m. (reservations are required at 412-281-0912, ext. 216, or tickets@pittsburghopera.org.

First Published: September 16, 2010, 4:00 a.m.