Summary: This game is an entertaining way to teach kids about science. In this game you learn about geography, physics, the human body, colors and sound, and lastly biology. There is no story to this game just two game modes= game mode and career mode (which is like daily training).
Summary: I bought this game for my 7 year old and she mastered the entire game in less than a month. As others mentioned, you can unlock as you complete your practice (they call it career). However, there aren't many things to unlock.
Summary: Please see the other reviewer's detailed comments. I completely agree with all those comments. I got this game for 5 year old, and he is loving it. It is easy enough, and at the same time it has some new things to learn. So that way it keeps it interesting for my 5 year old.
Summary: We bought this for my six year old son, who loves science. The games are really neat and will only open harder lessons once the first ones are mastered. There are five categories including colors and sounds, physics, biology, human body, and geography.