My son is 8 1/2 and I quite often say no to him doing certain things as I worry about his safety - sometimes unnecessarily quite probably - or because I don't think he can do it/is old enough.
I am not into letting them grow up because they have too if it is a risky thing he wants to do but I do want to strike a happy medium.
I am very protective of my children - they have had several emergency dashes to the hospital - but I wonder if I am saying no too often.