The big switcheroo returns to Kids Discovery Museum in October.

Go green and easy on your wallet this Halloween and find your costume at Kids Discovery Museum during their annual costume swap.

KiDiMu members, visitors and the public at large are invited to donate any gently used children’s Halloween costumes, costume pieces and accessories, and exchange them for something new (or “new-to-you”). Costume drop-off or pickup only also welcome.

The swap will be held daily during museum hours.

For more information, call 206-855-4650 or visit www.kidimu.org.