1. "Blues for Greens" Earth Day Festival. 10 a.m.-6 p.m. today. Environmentally friendly organizations, blues music and ethnic food vendors. Water Works Park, 2201 George Flagg Parkway. 283-8791, Brian.Crowe@dnr.state . ia.us or Allan.Goldberg@dnr.state . ia.us. Free.
2. Drake Relays street painting. 1-4 p.m. today. Student groups paint squares on Carpenter Avenue between 27th and 28th streets. Parade at 3 p.m. Sunday starts at 24th Street and University Avenue. Drake University, 2507 University Ave. www.drakerelays.com .
3. 20th Mayor's Annual Ride for Trails. 8:30 a.m. today. Proceeds support Des Moines' recreational trails. Des Moines City Hall, 400 Robert D. Ray Drive. 237-1404, www.dmgov.org . The cost is $25.
5. Weekend of Wheels. 10 a.m.-4 p.m. today. Iowa Motor Sports Expo vehicles will include street rods, custom, classic, sprint and race cars; also motorcycle show. Downtown Knoxville. (641) 828-7555, knoxville-iowa.com, trowley@iowatelecom.net . Free.
Beginning Genealogy. 9:30-11:30 a.m. today. Iowa Genealogical Society Library, 628 E. Grand Ave. 276-0287, www.iowagenealogy.org . Free; reservations required.
MySpace for Parents class. Noon-2 p.m. Sunday. Snacks will be provided. Fellowship Hall, Immanuel Lutheran Church, 900 Warrior Lane, Waukee. 987-4089, www.ilcwaukee.org , ILCYouth@msn.com .
Iowa NatureMapping training workshop. 9 a.m.-4 p.m. today. Training for people interested in becoming NatureMapping volunteers. NatureMapping is a hands-on environmental education program. Crown Point Community Center, 6300 Pioneer Parkway, Johnston. For information, call 727-7765 or e-mail switmer@ ci.johnston.ia.us. $30; reservations suggested.
Second Annual Hangar Dance. 6 p.m. today. Barbecue dinner, then music provided by the Big Band of Boone. Boone Municipal Airport, 424 Snedden Drive, Boone. $10 dinner and dance, $5 dancing only.
Earth Day celebration. 9 a.m.-3 p.m. today. Voas Nature Area, 1930 Lexington Road, Minburn. 465-3577, www.co.dallas.ia.us , dallascocons@iowatelecom.net . Free.
Neighborhood cleanup for Earth Day. 9 a.m.-noon today. Bring work gloves and wear tennis shoes. Trash bags and some litter sticks will be provided. Hoover High School, 4800 Aurora Ave. kencraig@mchsi.com .
Spring Art Mart: Arts and crafts sale. 9 a.m.-3 p.m. today. Blown glass, pottery, jewelry, knit scarves, hand-woven baskets. Pine Room, Iowa State Memorial Union, Iowa State University, Ames. (515) 294-0971, letitia@iastate.edu .
Block & Bridle Horse Show. 7 a.m. today; 8 a.m. Sunday. Iowa State Fairgrounds, East 30th Street and East University Avenue. 294-5260, www.iowastatefair.com .
Gun show. 9 a.m.-5 p.m. today; 9 a.m.-3 p.m. Sunday. 4-H Exhibits Building, Iowa State Fairgrounds, East 30th Street and East University Avenue. (888) 552-1486, www.iowastatefair.com . $5 adults, $1 children ages 11 and younger.
Iowa Helicopter open house. 9 a.m.-5 p.m. today. Ankeny Regional Airport, 3700 S.E. Convenience Blvd., Ankeny. 240-4328, www.iowahelicopter.com . $35 for adults, $25 for children 12 and younger.
"Tip-A-Cop." 4-10 p.m. today. Police officers will serve guests to raise money for Special Olympics. Texas Roadhouse, 8774 Northpark Drive, Johnston. 251-4597. Donations are accepted.
Start! Des Moines Heart Walk. 8 a.m. today. One- or three-mile walk to raise funds for the American Heart Association. Living History Farms, 2600 111th St., Urbandale. 246-4566, www.heartwalk.kintera .org/desmoines, joani.matalone@heart.org .
Orchid show and sale. Today and Sunday. The Central Iowa Orchid Society event will be in the Lower Bridge Court. Merle Hay Mall, 3800 Merle Hay Road. 276-8551, www.merlehaymall.com .
FFA spring plant sale. Through May 31. Bedding and vegetable plants, perennials, evergreen trees, fruit trees, brambles, shrubs, shade trees and deck planters. Central Campus Greenhouse & Nursery, 201 S.W. County Line Road. 242-8363.
Iowa Youth Chorus "SpringSing." 4 p.m. today. Hy-Vee Hall, Iowa Events Center, 730 Third St. 262-8312, ext. 10, iowayouthchorus.org, stevechandler@iowayouthchorus. org. $10 adults, $5 students.
University of Dubuque band concert. 7 p.m. today. Blades Auditorium, University of Dubuque, 2000 University Ave., Dubuque. (563) 589-3000, www.dbq.edu . Free.
Annual Walk for Wildlife. 8 a.m. today. 10K or 5K family route. Proceeds will go to improve Polk County's habitat. Held at Shelter 3. Jester Park, 11407 N.W. Jester Park Drive, Granger. 323-5300, www.leadingyououtdoors.org . $15.
Dodgeball tournament. Today and Sunday. $250 bar tab to the winning team. Overtime Sports, 121 S.W. Second Ave. 240-5225, dodgeball@myovertimesports.com . $150; registration required.
National Derby Rallies. 8:30 a.m.-3:30 p.m. today and Sunday. Greater Des Moines Soapbox Derby races. Ewing Park, 5100 Indianola Ave. www.dmsoapbox.com .
"Alice in Wonderland." 11 a.m. today. Just like adult dinner theater, only it is lunch on Saturdays. Class Act Productions, 201 First Ave. S., Altoona. 967-7950, www.captheatre.org . $10.
"Annie Get Your Gun." 7:30 p.m. today; 2 p.m. Sunday. Ankeny High School, 1302 N. Ankeny Blvd., Ankeny. 963-4335. Reservations are suggested. $8 adults, $5 students.
"Charlotte's Web." 2 p.m. today and Sunday. Tickets on sale at Ace Hardware and the Pumpkin Patch in Ames. Meeker Elementary School, 300 20th St., Ames. (515) 232-6500, (515) 292-9454. $8.
"Die Fledermaus (The Bat)." 8 p.m. today. Drake Opera Theatre. Performing Arts Hall, Harmon Fine Arts Center, 25th Street and Carpenter Avenue. Adults $12, seniors and students $6.
Kangaroos on Pogos! 7:30 p.m. today. Comedy XPeriment's long-form improv. Stoner Theater, Civic Center of Greater Des Moines, 221 Walnut St. 246-2300. $8 at the door or through Ticketmaster.
"Mamma Mia!" 7:30 p.m. today; 1 and 6:30 p.m. Sunday. Civic Center of Greater Des Moines, 221 Walnut St. 246-2300, www.civiccenter.org . $25-$67.50.
"Measure for Measure." 7:30 p.m. today. Allen Black Box Theater, DeWitt Theatre Arts Center, Northwestern College, 101 Seventh St. S.W., Orange City. (712) 707-7098, www.nwciowa.edu/theatre , boxoffice@nwciowa.edu . $5 adults, $3 students.
"The Full Monty." 8 p.m. today; 2 p.m. Sunday. Musical about six unemployed steelworkers in Buffalo, N.Y. Des Moines Playhouse, 831 42nd St. 277-6261, www.dmplayhouse.com . $19-$32.
"The Male Intellect: An Oxymoron?" 7:30 p.m. Wednesday-Friday, 5 and 8 p.m. Saturdays, 3 p.m. Sundays through April 29. Actor/writer Robert Dubac ransacks his brain to answer the age-old question, "What do women want?" Temple for Performing Arts, 1011 Locust St. 288-4700, www.civiccenter.org . $25-$30.
"The Music Man." 7 p.m. today. Stephens Auditorium, Iowa State University, Ames. (515) 294-3347, www.center.iastate.edu . $14-$19 through Ticketmaster.
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