This is by far and away the best kids app I have seen on any platform. Period. The graphics are gorgeous, the soundtrack is top quality, and its jam packed with different games, most of which teach specific and varied cognitive skills.
My 2 year old keeps coming back to this game over and over. He can play it for a long time completely unattended. Naturally he doesnt always play by "the rules" for all of the games, but many of them he can score quite high. As he starts to grasp more concepts he will be able to master more and more of the games in this jam-packed app.
All of the games graduate their difficulties well, with most of them having a very low barrier to entry. One improvement I would suggest for younger players is to change the win/lose logic, such that if a kid is struggling with a certain difficulty increment, the game stays at that level of difficulty a bit longer. Currently the game will quit, though the big "hooray" cheer always makes my boy feel like hes achieved something.
This developer deserves a lot of credit for a very rich game. I have not found this kind of value for dollar anywhere else.
valen2202 about Bugs and Bubbles, v1.1