How do you make two kids cry

In my house to make kids cry you need to give the 4 year old a haircut, which he has hated and freaked out about since he was little, and when he cries so does the 2 year old.  Sunday night brought me giving Landon a haircut, which always brings on a freak out session.  As he was crying about his hair cut, Sienna started crying because Landon was crying.  After it was all done things where much better and he was actually excited to show the kids in his class his new haircut.