Youth tennis activities at Q-C Air Show: The United States Tennis Association has announced its SmashZone Mobile Tour will be part of the Quad-City Air Show, June 22-23, at the Davenport Municipal Airport. The tour introduces audiences to tennis in an interactive way by featuring four youth-sized tennis courts, games, skill challenges and other activities.

The theme of the 2013 air show will be “An Aerial Salute to the Greatest Generation WWII.”

Explore the Mississippi River this summer: River Action’s Explore the River Series will offer Channel Cat Talks and Riverine Walks from June 4 to Aug. 31. These opportunities take participants to sites on the river and along the riverfront to explore history, culture, nature and more. Channel Cat participants board a water taxi on the Mississippi River while experts offer informational talks, including, “Birds of the Mississippi Flyway,” and “Native Americans and the Mississippi River.” The river walks offer participants the chance to walk along and explore the river’s history and environment.

Explore the River is in its sixth year. It is intended to create an awareness of and appreciation for the Mississippi River by exposing people to unique sites on the river as well as educating about the river. Registration and schedules are available online at www.riveraction.org or at the River Action Office, 822 E. River Drive, Davenport. Each Channel Cat session is $12. River walks are free to River Action members and $5 for nonmembers.

Youth organization seeks members: Teens for Tomorrow is accepting members for the 2013-14 school year. Members have the opportunity to make a positive impact on the community by distributing annual grants to local nonprofit organizations. Members will learn about the grantmaking process and develop teamwork, communication and leadership skills, as well as become better informed about the community. The program is open to students grades 9-12 attending high school in Rock Island County and Scott County. Meetings are held one Sunday a month from September to May. Applications must be postmarked by Friday, May 31, and should be sent to Community Foundation of the Great River Bend, 852 Middle Road, Ste. 100, Bettendorf, IA 52722. Applications can be found at www.cfgrb.org.

Golf outing to benefit first responder training: Eastern Iowa Community Colleges will hold the fifth annual 1-800-BOARDUP Golf Outing at 9 a.m. Wednesday, June 5, at Palmer Hills Golf Course, 2999 Middle Road, Bettendorf. Proceeds will support the colleges’ Midwest Center for Public Safety Training. The facility trains firefighters, EMS and law enforcement personnel. The four-man, best ball tournament costs $60 per person, which includes a cart and lunch. To register by May 25, go to www.eicc.edu/boardup.

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Rock Island real estate tax bills mailed: Rock Island County Treasurer Louisa A. Ewert announced the mailing of 63,273 Rock Island County real estate tax bills totaling more than $216,550,803. Taxpayers who have more than one parcel may receive several statements in one envelope. Four stubs are provided for taxpayers using the four installment plan. Due dates are June 12, Aug. 12, Sept. 12 and Nov. 12.

Ewert also announced the mailing of 1,616 mobile home tax bills totaling $115,139. These bills will be due Friday, July 12.  Failure to pay taxes by the due date will result in a penalty of $25 per month.

Payment may be made by mail or in person at the County Treasurer’s Office, 1504 3rd Ave., Rock Island, between 8 a.m. and 4:30 p.m. Monday-Friday, excluding holidays. For all tax information, go to www.rockislandcounty.org.