Games without attendants?

Does anyone have suggestions for online games that kids/adults can play without having someone having to be present to run the game? For instance, cornhole (beanbag toss) or other lawn games themed just for Halloween would work. However , I’m endeavoring to think outside the box. Has anyone got any success with things to keep the guests entertained without you having to monitor or maintain it the entire time? What works for kids? Adults?

Originally posted 2014-09-07 04:33:46. Updated!