Everything from dinosaurs to horseshoe crabs on roller skates are on view this month at the Arlington Arts Center in "Artists, At Play?"--a show that is full of color and spunk.

The attention grabber is John Dickson's "The Procession of Princess Tourndot," a sculptural parade in the main showroom of "found objects, wood, tape, paint and Rhoplex," a brochure says.

Actually, that description does not do it justice because each study of a processional creature manages to transpose an everyday object into something unrecognizable. Coke bottles, golf clubs, roller skates and a Big Wheels bike are just a few of the shapes that have been woven into new forms.

There are other show stoppers, however. "Target Man," by John Ryan, and Barbara Smith Herzberg's series of photographs entitled "What Is There To Fear" create some disturbing or eerily intriguing images. Along with the macabre there are some light and aesthetically pleasing pieces. Jenna Watson's "Dinosaur Diorama," a miniature fantasy world, is a feast for the eyes.

The show at the Arlington Arts Center, 3550 Wilson Blvd., Arlington, continues through June 10. For more information, call 524-1494.

Incidentally, down the street from the center, at the main branch of the Arlington County Library, are some lively posters by elementary school students.

All were done to promote "Folk Festival '83," a celebration of the county's various ethnic cultures to be held Friday, Saturday and Sunday at The Thomas Jefferson Community Center. For more information, call 558-2166.

Other Events:

* "Dancescapes and Landscapes," by Craig A. Schlemmer, Gallery West. For more information, call 549-7359.

* Prince William symphony concerts, Saturday and Sunday at Woodbridge and Stonewall Jackson high schools.