Saturday. Swimming season starts with a splash when Water World opens for the summer. The 64-acre water park begins daily operations on Saturday, just in time for the scorching months ahead. Rides range from mild to wild—drift peacefully on the Lazy River or plunge into a “Voyage to the Center of the Earth.” Two new rides join the lineup this year: The Double Dare, the park’s latest speed-tube slide, and the Mile High Flyer, a “hydromagnetic water coaster” built for thrill junkies. 10 a.m. to 6 p.m. daily through August 13; variable hours follow through Sept. 3. Water World, 1800 W. 89th Ave., Federal Heights; 303-427-SURF. All-day tickets are $39.99 for guests 48 inches tall and above; $34.99 for kids 47 inches and shorter; $8.99 for seniors age 60 and older. Toddlers 40 inches and shorter are free. Reduced admission prices begin at 1:45 p.m. waterworldcolorado.com

Weekdays through August 3. It’s one of the best places to cool off in the summer: the movie theater. Families can make it a weekly habit at Summer Movie Fun for Kids at the Harkins Northfield 18 cinema. A different just-for-kids movie screens each week at the theater, starting with “Happy Feet Two” on Monday. Tickets to the show are only $2, or buy a $5 “season ticket” that’s good for every movie over the summer. Upcoming films include “Dr. Seuss’s Horton Hears a Who!”, “Alvin and the Chipmunks: Chipwrecked” and “Rio.” Keep in mind that kids must be accompanied by a grownup—and vice versa. 9:45 a.m. Mondays through Fridays, through August 3. Harkins Northfield 18 Theatres, 8300 E. Northfield Blvd.; 720-374-3118. Season tickets are $5; individual show tickets are $2. harkinstheatres.com

Kathleen St. John