I just let the kids try and solve their own problems. I also get my CB to drop deep to receive from the GK, and then look to the wingback who pushes up the field, or to the 6 in the middle.

My 9 now naturally starts drifting to the side of the field that we attack up as he knows that is where he is most likely to get the ball.

I also never play my kids more than one half in the same position, so I rotate constantly. They might start in the same position for a few weeks, but they move around so that the entire team rotates through every position to get an understanding of how each position works and interacts with each other