What am I?

Send poorly behaved children to me and let them sit here. What am I?

related riddles

I make noise yet you don't see me make it. I alarm for good yet sometimes for worse. I have a companion. What am I?

Although I may have eyes, I cannot see. I have a round brown face with lots of acne.

Step on me and you'll reach the top first, but step under me and you're cursed. What am I?