How many adults do you know who used to play the piano when they were kids? How many adults do you know who wished they still could play the piano or another musical instrument? I've tried to pick up a new instrument as an adult, and it's much harder than when I was a kid! Not to mention the fact that 30 min. a day now is much harder to find than it was back then.
Encourage a young musician. Find a concert or recital to take them to. Dust off your old instrument and let them see you give it another try. Show them that playing the piano is fun and cool (really, the older they get, the more others will admire them for it.) Maybe this video of Jon Schmidt will be inspiring.
Or this one. This is my son playing a song by Jon Schmidt called Road Trip. He also made the video. (Remember as you listen, mistakes are as much a part of the learning process as practicing is!)