How To Fix A Knee (for kids age 7 and under)

It was a rainy day and we were playing capture the flag inside (except it was called "Treasure Chest" and there were multiple flags) when one of my kids comes over to the bleachers where I'm sitting and sits down. I ask him what's up and he says that he hurt his knee (I forget how he hurt it, I think it involved someone else and the hard gym floor). So I ask if I can fix it, he says yes and moves up a row to sit next to me.

First, I had him close his eyes and keep them closed until I said to open them. Then, I asked him what color the pain was.
"Blueish, blackish, and a little yellowish" was his reply.
"Okay," I said, "Now, don't open your eyes! I'm going to wave my hands over your knee, I'm not going to touch it, then, after I count to three you're going to open your eyes, but you have to focus on that color and think about it hard while I'm doing that, okay?"
"Okay."

He squeezes his eye lids together while he's focusing on the color and I move my hands around just in case he's peeking.

"3...2...1..."
I snap my fingers and he opens his eyes. His jaw drops when he looks at his knee and doesn't see the colors he's been focusing on so hard.

"All better?" I ask.
"Yeah!" He exclaims happily.
"Now get back out there and play!"

He jumps off the bleachers and runs back to his side of the gym. When he gets there, he turns back around and gives me a big smile and wave before quickly dashing off to the opponent's side to retrieve some treasure.

I got that trick from "Full House" a show that is definitely too old for him. It comes on Nick at Night (I think) and WGN, two things he's not very likely to watch, especially if he has the Disney Channel or Cartoon Network. Even if he had seen it, it wasn't likely he had seen the episode I got it from, or if he had, he may have believed that it would work because it had worked on Michelle.

I'd been dying to try that all summer to see if it would actually work, and it did! I don't think though that any kids older than 7 or 8 would believe in it enough for it to work on them though.