Be inspired by the past and present stories of people who care for the Duwamish River by making fun and playful cardboard mechanical toys from 1:30 p.m. to 4 p.m. Saturday, April 28 at the South Park Branch, 8604 Eighth Ave. S., 206-615-1688.

Learn how to design simple mechanisms by building cardboard machines. You'll explore levers, cams and other mechanisms to make your mechanical toy move.

Library events are free and open to the public. Registration is not required. Free parking is available in the branch parking lot. This event is intended for ages 8 and up. Spanish text describing this event is available in the Library's calendar.