 But between the ages two and six, the cartilage in the kneecap begins to ossify or turn into bone, starting in the center and moving out to the edges. Always learning on this show. Yes. Have a good weekend. You too. I'm out the door. Going out with Tony Orlando in the dawn. The biggest hit of 1973. That's going to do it for John and myself this morning. We'll be back bright and early Monday morning for the Wake Up Crew. Join us then.