Jose, My name is Ryan. I also coach U12 boys. Come to my page to learn about me. Anyway this is my favorite drill. Line up your guys and tell them to start juggling as much as they can. See who can do it the longest. Then tell them to put the balls on there back and try to take their shirt off without the ball falling. People will get hot so they will want to take it off. My 5 year old son Micheal can do it. So you can too
I have used some of the soccer drills and tips from the Better Soccer Coaching website www.bettersoccercoaching.com, maybe you will find them useful as well :o)