Summary: I am a natural leftie and was always told as a kid that I was ambidextrous. Well, I found out that I am. I can say that my right hand gets really sore after using it so much trying to match my left. But it's a fun game. I got it second hand at gamestop for $18.00 and since I am new to Nintendo DS I am just trying different types of games. I'm sure I will find others that I like better but as a 35 year old I am having fun with this one.
Summary: I thought I was ambidextrous since I can write, do various tasks and play games with either hand. This is a very good at improved your abilities in the non-dominant hand. It works well for hand and eye coordination. There are multiple levels graphical representations of your progress. If you are already ambidextrous, this game won't help. If you THINK you are ambidextrous, then try this game.
Summary: I mistakenly got this game after reading reviews for the original (which I won't buy after playing this one). The games are boring and really not much of a challenge. If you do get it, make sure to "redo" your dominant hand scores right away. Initially I did better with the non-dominant hand as the first pass with the dominant was basically learning the game.
Summary: My 6YO son always tries to play my DS games (Brain Age types) and can't do it. Left Brain/Right Brain is simple enough that he can actually enjoy without frustration. At a good price (I bought used for 12.99), it's worth it for that alone. He is also tickled to turn the DS around to do the Left Hand thing. I'm not in interested in true ambidexterity, but I'm sure that doing things with your weak hand is good for the brain. The game is simple and not stressful.