"Feeding off Each Other"

My boys feed off each other, especially at night. They get to screaming and laughing and chasing each other up and down the hall and it's 8pm at night. It's time for bed. You can't help but smile and laugh with them. I think it's hilarious when they just have their diapers on and they are running as fast as their little feet will carry them. Nolan usually wipes out. He's still not that steady on his feet. But he pops back up and takes off, full speed; giggling, screaming, a huge smile on his face.