I can sort of see where you are coming from debbiehep, and some of your concerns are valid. We need to be careful that stimulus, be it factual or fictional, has its place and is appropriate. However, you are raising concerns that to me seem, as I said, like mere pedantry. What do you perceive as the harm of staging such an event as an alien crash landing in the playground? You are raising concerns and asking teachers to re-evaluate practise, yet I am not sure why.