I'm thinking of sometimes running without any clothes on by a children's playground that I donate to.
I don't understand what would make you think of something like this. Do you think doing something like that would be funny?
I thought about it and I'm going to visit the police to ask if it's legal or not.
That is illegal for you to do. You shouldn't be naked in front of young children since you would be considered a child predator. This could ruin your reputation and your career.
That's a lie... I'm going to start doing it.
I suggest you reconsider, since this will undoubtedly land you in jail. It could also traumatize the children. You wouldn't want to be responsible for that would you?