My son started Interactive Metronome yesterday.  I waited until this year to have him start because at the age of 6 and being extra wiggly, he just couldn't focus on it last year.  This year, he understands the program more and is motivated to do it because he know that some pro athletes complete Interactive Metronome training as well.  Since he wants to be a pro soccer and pro baseball player, it was the perfect time to get him started.  My sons's ADHD symptoms have not been affected much by medications or nutritional changes, so the I.M. training is something that I have high hopes for.  I'll keep you posted!