* The Oak tree-lined grounds of the Santa Barbara Museum of Natural History, 2559 Puesta del Sol Road, will evolve into a kind of artist village this weekend for the third annual "Kids Arts Festival." Children of all ages can take part in an array of creative fun--with more than 20 workshops and activities--including origami, pottery making, pinata building, mural painting, sculpting, mask making and improvisational acting. Admission: $1 children, adults free. Workshops are $3.50; $2.50 with a Kids' Passport, which will be issued on site. Hours: 10 a.m. to 4 p.m. Saturday and noon to 4 p.m. Sunday. Information: 965-3128.
* The Santa Barbara Dance Alliance will present its 17th annual "Choreosplash!" at the Lobero Theatre, 33 E. Canon Perdido, at 8 p.m. Saturday. Eight choreographers will present new works, focusing on the modern dance discipline. Several of the dances will deal with family and relationships. Tickets: $15, $10 students. Call 963-0761.
* UCSB Arts & Lectures brings El Vez "The Mexican Elvis" to the campus' Campbell Hall at 8 p.m. Friday for an evening of lighthearted Latino conscience and high camp. El Vez & the Memphis Mariachis blend Mexican American themes with the music of Elvis Presley. Tickets: $9-$16. Call 893-3535.