Alien invasion at school

This is either an alien invasion or the start of a cross-school project. Some of the older children are cynical about the fact that the alien goo looks like silly string. Also one of the Year Fives asked the police for their ID cards. The little ones have started seeing evidence of aliens everywhere. My two are checking Newsround nightly to see if the U.F.O is mentioned. I just hope the project ends before my daughter wets herself.