The rule with spelling in the UK (and I believe in most countries where they speak English) is that its C in a noun and S in a verb - so you give advice , but advise someone; or your practice is to practise regularly and so on. Advise is the one to remembber, because you pronounce it differently.)

The best way to make kids learn to play an instrument is to have someone try to forbid them. "I'm not having any son of mine play the violin!"