Dr Kawashima's Brain Training: How Old Is Your Brain? (Nintendo DS)

The lowdown:
Nothing about this game is ordinary, from the price to the way you hold the DS while playing it (vertically, as if you were reading a book). The basic idea is that you play through a series of puzzles each day, for about 10 minutes, and at the end of each session the "age" of your brain is calculated. The puzzles themselves range from simple maths questions to spot the difference, memorisation and comprehension. All of the answers are inputted either by drawing the answer on the touchscreen or speaking it into the DS's in-built microphone. There's also a multiplayer mode for up to 15 people where you can try and compete to record the youngest brain age.

Most exciting moment:
A brand new addition to the game, not included in the Japanese version, is a special DS version of Sudoku. This works great on the DS's touch screen and is worth the already low price of admission on its own.

Since you ask:
A sister title to Brain Training, named Big Brain Academy, is due for release in July and offers to "weigh" your brain and improve specific skills such as memorisation and analysis. A direct sequel to Brain Training has also been released in Japan but is not yet scheduled for released in the UK.

The bottom line:
The only game that really is for the whole family - from kids to OAPs.
Harrison Dent