Crack up

The other night Lilia was cracking me up...we were at Bible study and there was no babysitter so she was hanging out with us. She found some object that was circular and I guess it reminded her of a stethoscope. She put it up to my shoulder and whispered, "I can hear your heart beep." I laughed out loud and she said it again. I laughed louder; I just couldn't hold it in.