Make recordings of household sounds. Speed them up or slow them down. Listen for rhythm, meter, pauses. Describe each other's laughs. Talk about your needs for different kinds of sounds and/or silence.
Put on a lecture series for your community on improving listening skills. Counseling and therapy organizations should be able to provide speaker suggestions. Topics might include listening to your children/parents; developing your intuition; hearing the hidden messages in the media; identifying animal calls, etc.
Sometimes the sounds we want to hear are drowned out by a cacophony of noises coming out of our radios, cars, machines, and tools. Do a survey of your neighborhood to determine what sounds people appreciate and which are bothersome. Learn about the sound pollution guidelines are for your community, and report any offenders.