How can you punsih this?

Rhylan has started turning over this little red buckent, and setting it on top of a chair to sit on. We think this is a little dangerous and try to keep her off of it so she won't fall. But........ When you peak around the door to see what she is up to, and you see this :
How can you punish her? She is reading a book to her baby. She was even helping the baby turn the pages!