My wife and daughter were downstairs and my wife needed to do a couple of things upstairs. My daughter wanted to help out and headed up the stairs too. She made it to the top just in time to see my wife ready to head back down. Frustrated, my little girl launched into a temper tantrum and my wife put her in time out.
"When you're done, you can come back downstairs and help me some more," my wife told her.
After a while the tantrum stopped and my wife went to investigate. Our little daughter quit crying, decided instead of rejoining her mother that she was tired. So instead she went to her room, closed her door, climbed into her bed and fell asleep.
So she may not have the ability to tell us everything that she's thinking, but she's definitely getting to be quite the little decision maker.