How to write some warm tips for staying in the kindergarten after school to avoid injury?

Next to some large toys in the garden, write down the rules of the game, tell them the correct way to play, and remind parents of some safety issues when picking up their children. In fact, there is no need to write any tips, which may not achieve the effect! Only when there is a problem, they will be alert. It is good to be so considerate for their parents. However, sometimes they need to face and deal with what they should do, so that the school work will be more relaxed! The above is just my personal opinion. Please forgive me if there are any inaccuracies!