As a teacher, I try to instill in the children I work with an appropriate level of responsibility. Show your best effort, clean up after yourself, take care of your belongings, etc. I often have to remind my students that they, not their parents, forgot their homework, or jacket, or backpack. So I was especially gratified to hear Munch say in the car yesterday, "Oh no, Mom! You forgot to..no, wait..I forgot to brush my teeth!"
For three-years old, we're off to a good start!