Summary: We got this game with the DSi bundle. As long as you are getting it as part of the bundle, it's great. I would not recommend that you go out and buy the game on its own, unless you can get it for $10 or less. My 5 year old has been playing it and she likes it, but I can tell that it is not going to have long staying power.
Summary: The game on Zenses Ocean are okay. You only get ten or so games to choose from. It isn't reaxing, but is has fun, unique games on it. It's not worth thirty dollars, I would buy for Like 5 dollars or so. Only if you have a lot of time on your hands, i would get this game.
Summary: I like this but not as much as I'd thought. It's simple to play any of the games. I wouldn't say it's relaxing. I find myself playing this less than any other game I've purchased. Maybe there is not enough challenge or gratification when you win. Don't know...
Summary: I own both ocean and rainforest and while the games are entertaining I don't find them relaxing...in fact I would call the music annoying. If I had to choose one based on the games I would go with rainforest.