You can't light a fire in your kid to love the game, but you can certainly snuff it out.
The most important thing is finding them an environment where their love of the game can flourish. If they love the game, they will work hard at it, because it doesn't feel like work if you love it.
It shouldn't feel like a job or like a chore - because it isn't. It's supposed to be fun - kids play sports to have fun.