Tips for preparation and performance of a play !
Pre-learn the vocabulary first. Once the children are familiar with the separate words let them start practicing the lines in the play. The idea is not to have individual children word-perfect in their own roles but to let the whole class experience using the vocabulary in context.
Only when all the children know the key words and lines of the play should you put together all the elements – words, expression and movement. Allow the children to use their own creativity in setting the scene, deciding on props, costumes etc.
Finally, if at all possible, take a video of the play. Not only will the children love seeing themselves act, it will enable you to give them feedback later and will provide you with a benchmark against which further development can be determined.