Memory trainer is one of those games that are both fun and educational... sort of.

At the beginning you pick how many colors and lines you want to play with (basically you set your difficulty). During the game you get random color blocks and drop them in lines. Drop the same colors next to each other to get the max score. This is also where the memory training part comes in. Blocks all turn the same color once droped, so you have to remember which color is where!