I used to be a pre-K teacher.
And old classmate of mine reached out to me on FB. She ran a pre-K and wished me the best. She said that in her state, she wasn't allowed to hire men.
Anywho, I worked with three year olds and it was a great teaching experience. They gave me free tuition for my kids. I worked with phonics, pattern recognition, etc. My kids made friends and I was home by 2:00.
Oh, and parent/teacher conference days were great! The parents would simply ask "how's my kid?" Rather than "How's my kid getting into Harvard?"