A cell phone hack that allows low-tech to meet high-tech: when you want to amplify the sound coming from your mobile phone (and don’t have that little speaker ball handy), just set the phone in a ceramic bowl.
Simply grab a bowl from your kitchen cabinet, but make sure it’s ceramic, not glass, plastic or melamine. (A ceramic bowl will be heavy and make a “ping” sound when you hit it with a spoon.) Put the phone in the bowl and listen to the music clearly.
Younger people, who have never known life without a cell phone, will be particularly impressed and perhaps even baffled by this hack.