Do you let your kids let themselves loose at a playground where they are having fun being KIDS?

I let my kids run around and have fun but i also pull the reigns if they get to that over excited mark. I want them to enjoy the playground and I want the other kids in the play ground to enjoy it too ;-) so if they get too excited which doesn't happen very often at all, I will just to get them and play on the swing or help them over the monkey bars, so they are still playing and I am not telling them to stop anything i just redirect their energy into something else :P