There is only YES
Whatever you give your attention to expands in your experience. That phenomenon has been called “the law of attraction,” but it’s also self-evident.
And it means there’s effectively no such thing as NO... There is only YES!
If you tell your child, “No, you may NOT have any candy! It’s BAD for you! You shouldn’t eat that junk,” then you’re essentially saying YES to candy by focusing so much attention on it. The more you resist it, the more you’re thinking about it, which makes it seem increasingly powerful and attractive.
The key to happiness in a YES-based universe is to stop resisting what you don’t want, and focus positive attention on what you do want.
If you truly believe your child is better off without something, then look for something else to say YES to — preferably something even more attractive.
And remember that Life Energy and Unconditional Love are more attractive than any thing.