Pass out one large marshmallow to everyone. Instruct the to NOT do anything but hold it. Once everyone has one, tell them to put it in their mouth but DO NOT CHEW IT OR SWALLOW IT. Just let it sit on their tongue. Then make your announcements, or just talk about anything. This will allow the marshmallow time to dissolve a little bit. After about 5 minutes or more tell them they can either spit it out in the trash can or chew it up and swallow it. Then make the point that if we continue to surround ourselves in sinful lifestyles you will either give in (chew it up and swallow it) or you will get rid of it (spit it out) This is great to lead into a discussion on peer pressure, sin and deliberate sinful lifestyles.