A clique is a group of friends that don't want other people to join their group. Cliques can be a form of bullying and can hurt other people's feelings. In Izzy's video it says that you shouldn't get emotional, and say it's okay that they don't want you to be in their group. They might feel bad and accept you. If you get emotional they probably will never let you in their group or exclude you for the rest of the year.
Here is Izzy's video down below.
To learn more, go to : http://kidshealth.org/kid/feeling/friend/clique.html
Above we have two videos that show the wrong way to handle cliques and the right way to handle cliques.
This is the wrong way