There's a book called "Smart Moves". It provides a physiological explanation for why something like Brain Gym should work. It also provide a case histories of the author's own experience of using Brain Gym.
I use it with my kids. It hasn't turned them into geniuses, but it does demonstrate that thinking capacity isn't determined only by mental potential.
I would say go ahead and do it. Just like all the stuff you find on this forum, it's not a miracle pill. I just something else that can help.
I exercise that next to no time to do, and I'd say they are worth the time. There is the learning curve, which is fairly small if you just do the Brain Gym books, and skip the Smart Moves book. Someone like me likes to have a plausable explanation for why it should have any effect. The book gave me that, which is not to say I agree with everything stated in the book, or even the authors cause and effect claims. However, I can see how it could be helpful.
Try it, learn and share.
Iam2 
P.S. There are other threads talking about Brain Gym on the forums. Just give it a search.
