Come again!?

I couldn't help but post this right after hearing it. Hope it brings a smile to your face like it did mine! Have a great day!

ME: How was your day at school?
LITTLE MAN: Good! I had an Abstitute.
ME: An Abstitute? What does that mean?
LITTLE MAN: It means my teacher was absent so we had another one teach us today.
ME: OHHH! A substitute!
LITTLE MAN: Yes, a substitute!