Dr Kawashima's Brain Training - How Old Is Your Brain - Sudoku Download 2 (Europe) (Demo) (Kiosk) is a Nintendo DS game developed by Nintendo and published by Nintendo. The game is based on the popular Dr Kawashima's Brain Training series and features a wide range of brain-teasing activities. The demo version of the game includes the classic Sudoku puzzles as well as several other mini-games designed to challenge and train the player's brain. The game also features a special 'How Old Is Your Brain' mode, where players can measure their mental age by completing various puzzles. The full version of the game also includes a multiplayer mode where up to four players can compete against each other. The game is available in Europe as a kiosk demo version. 日本語タイトル：ドクター・カワシマのおとなの頭の体操スドゥーコ・ダウンロード2（ヨーロッパ）（デモ）（キオスク）