Officer Rob Givens with the Vancouver Police Department will give a presentation from 6:30 to 7:30 p.m. April 15 about cybercrimes against children. The presentation at the Cascade Park Community Library, 600 N.E. 136th Ave., will provide tips on keeping children safe online. Parents can attend in person or online. More information is available at fvrl.librarymarket.com/node/136120.