Groonk's Newsmine 2.0

Nintendo has sold nearly five million copies of its three Nintendo DS brain training games since the series launched in Japan a year ago.

The first title in the series, Dr Kawashima's Brain Training: How Old Is Your Brain?, sees players follow a daily regime of brain-enhancing exercises and is due to be released in the UK in June.

Dr Kawashima's Brain Training comprises a variety of mini-games designed to give brains a workout.

Activities include solving simple maths problems, counting people going in and out of a house, drawing pictures on the Nintendo DS touchscreen, and reading classic literature aloud into the device's microphone.

Players are given a brain age reflecting their performance. Over time, your brain age should get younger as you achieve better scores.