Robb is recovering from his fourth knee surgery... yuck.
He has had some very miserable pain over the last few weeks, accompanied by (warning, this may creep you out) a loose particle underneath his skin. It's about the size of a pencil eraser, and he could move it around. I'm pretty sure that's not how God made it.
Sure enough, the doctor found that piece, which was a loose piece of cartilage. It's very small, about the size of a pebble... but when a pebble is in your shoe, you notice it and the pain it brings. That's what Robb was feeling underneath his knee cap.
He's on the mend now, and he's hobbling on crutches until he feels he can bear weight on it. The doctor says there is another surgery in his near future, since there is a place in his knee that is worn down to bare bone... that's where that blasted piece of cartilage is from.
Another knee surgery... not our favorite. But we'll cross that bridge later.
For now, Tuck is mesmerized by the crutches.