What is love?

I decided I was going to ask Clover (age 4) what love was today since she quickly said "I love you so much" right after she did something she shouldn't have and knew she was about to get into trouble. Her answer "Its made of hearts! Did you make my heart mommy since you made me?" I told her I did grow her and her heart, then she said "You grew my love". Yea, she didn't get into trouble... These girls have me wrapped around their little fingers.