Can do wrong now

You know that period in your child's life when you could do no wrong?  That time is now only a memory. Conversation at home yesterday:

Wife: So how many students are in your class this semester?

Me: Six, all graduate students.

11yr-old son: Only six? Wow. The class must be boring!

8-yr old daughter: Maybe the class is not boring. Maybe Appa just teaches it in a boring way.