Weekend Guide for July 29, 2016, clockwise from top left: Into

Lots of cultural offerings this weekend in Lawrence (Final Friday is here), from free opera at the library to a staging of Stephen Sondheim’s classic “Into the Woods” at the Lawrence Arts Center. Plus, plenty of down-home fun at the Douglas County Fair.

Water Balloon Dye Fight

2:30 to 3:30 p.m. Friday, Watson Park, 727 Kentucky St.

Cool off (and get a little messy) Friday afternoon at Watson Park, where Lawrence Public Library staffers are hosting a colorful water balloon fight as part of the library’s summer reading program for sixth through 12th graders.

The fight, which pits kids against other teen bookworms and Teen Zone staff, invites participants to wear their summer reading T-shirts, which will then presumably get soaked in all sorts of funky dyes. “Watch out,” warns the library: “You might end up dying your hair and skin, too.”

Permission slips are required, and can be picked up in the library Teen Zone or downloaded at www.lawrence.lib.ks.us.

Lawrence Opera Theatre at the library

6 to 7 p.m. Friday, Lawrence Public Library, 707 Vermont St.

The Lawrence Opera Theatre continues its tradition of delivering opera to the people this Final Friday with a free performance at the library.

As part of its upcoming seventh season, “Shakespeare 400,” a handful of LOT singers will present an evening of songs and arias from works based on the Bard’s (it’s the 400th anniversary of the legendary playwright’s death) words, characters and plays.

Complimentary light snacks and beverages will also be on hand, as will a corresponding reading and listening list from the library inspired by LOT’s Shakespearean season.

‘Into the Woods’

7:30 p.m. Friday and Saturday, 3 p.m. Sunday, Lawrence Arts Center, 940 New Hampshire St.

Catch Stephen Sondheim’s classic as performed by the young actors of the Lawrence Arts Center’s Summer Youth Theatre this weekend.

For those unfamiliar with the Tony winner, “Into the Woods” intertwines several fairly tale favorites — including “Little Red Riding Hood,” “Jack and the Beanstalk,” “Rapunzel” and “Cinderella” — into a musical tale following a childless baker and his wife on a quest to start a family.

Tickets cost $10 for adults and $7.50 for students, and can be purchased at the Arts Center box office or online at www.lawrenceartscenter.org.

Douglas County Fair

All day Friday and Saturday, Douglas County Fairgrounds, 2110 Harper St.

The Douglas County Fair wraps up this weekend, with all exhibits shuttering on Sunday. Among the remaining attractions Friday: pony rides from 4 to 10 p.m., a bale-throwing contest at 6 p.m., and the ever-popular demolition derby in the rodeo arena at 7:30 p.m.

On Saturday, check out the turtle race at 9 a.m., the 4-H livestock auction at 6:30 p.m., a musical performance by SELLOUT from 7 to 10 p.m. and the lawn mower demolition derby (like the regular derby, but with drivers atop riding mowers) in the rodeo arena at 7:30 p.m. Of course, the carnival portion will be open both evenings.

For a full schedule of events, visit www.dgcountyfair.com.