[quote name='RhysP' timestamp='1378562175' post='2201860']
You don't - if they're interested then they're interested, but don't try & force your interest in music onto your kids; there's nothing worse than being forced to do something you have no interest in.
[/quote]
this
and also if they perceive the whole piano schtick as 'being cool and fun' because you like it then despite the informal setting that will put them off even more (kids/parents psychology 101)
also mushers comment too above about peer pressure counts for a lot with kids that age - they are much more likely to be motivated if their friends are doing likewise and enjoying it