[Gayle]

There are somethings in life which, no matter how often or sternly a child is told 'that's not a good idea' or 'that's a bit dangerous' they still have to find out for themselves.

For example, as Zack was filling a balloon with water the other day, Chris tried to point out to him the faults in his plan. I told Chris to just let him get on with it because there is no amount of 'teaching' that will convince Zack that he's bound to end up soaked unless he actually tries it for himself.

Like

Rose petals soaked in water don't make perfume.
Kicking your brother only leads to him kicking back twice as hard.
Using felt tip pens as make up on your dolls won't come off.
Cutting your dolls hair doesn't make it look better.
Roller skates indoors - enough said!
Leaning back on the chair too far usually ends up with bumping your head.

I'm sure there must be many more examples.