Dumb it down
The first thing you need to realize is the fact that these are children working in the theatre production and not adults. As a result, their cognitive ability is not going to be up to the mark and they are going to spend a lot more time processing information.
For this very reason, it is best to dumb everything down, to make it easier to understand. You can dumb down the way you act, the plot line and the dialogue. Using analogies and terms that only adults would get shouldn’t be used and this is something that everyone should take into account.
Stay motivated and keep motivating
Children tend to get disappointed far more quickly than anyone else. This is because they aren’t used to disappointment just yet, but all of that would change for them eventually down the line.
However, with that not being the case just yet, it is best to keep motivating the children. Even if they make a mistake, you should cheer them on.
At the same time, you need to stay motivated yourself, if you don’t do so, they are going to pick off your vibes and then behave in the same manner.
Keep it clean
Since you are working with children, you should avoid using language and contexts that might be far more adult oriented.
This is why you should change the script so that the words that are being used are children friendly, and so that none of the parents have any issues later on.
It is important to do this, since most plays have lines that kids would not only fail to understand, but would also learn and use later on.