Nintendo announced today the release dates for two, not one, Brain Training games in the U.S.

Brain Age: Train Your Brain in Minutes a Day hits on April 17 and Big Brain Academy hits on May 30.

From the press release:

Brain Age presents players with a series of fun mental brain-training challenges that incorporate word memorization, counting and reading. It even includes sudoku number puzzles, which have become extremely popular features in newspapers around the country. The distinctive touch screen of Nintendo DS lets users write their responses, just as though they were using a PDA.

Players even turn the Nintendo DS sideways to make it feel more familiar, like a book. The more often users challenge themselves, the better they become at the tasks and the lower their estimated DS "brain age."

The second title in the series, Big Brain Academy (known as Brain Flex in Japan) offers players 15 fun activities that test their brain powers in areas like logic, memory, math and analysis. Up to eight people can play with a single game card, and each activity takes less than a minute to complete.

Nice. Put this up there with the PS2's PQ and you've got a regular Brain Gym going on.