Let me give you the Dodie perspective (which is quite different than what the Mommy perspective was):
Three year olds are a blast. They're so smart and independent, and they are beginning to understand things. They're also hysterically funny. My grandbrat was a riot at 3, when he wasn't being a little chit.
I could channel my inner brat and torment him instead of him tormenting me. Mock him, play copy cat, yell louder than him, etc. He'd whine about something and I'd repeat what he said in a Cartman voice. Made his mother crazy and eventually she'd make me stop, but now she does the same thing to him.
Riggs: Whine whine whine
Dodie: Shut up
Riggs: YOU shut up
Dodie: No YOU shut up
Riggs: YOU!
Dodie: No YOU!
(Enter Mommy)
We don't say shut up
Dodie: Oh, shut up
Riggs:
They're fun when they're not your own.