An exception to getting a D whistle to start out with might be if a young child is having trouble covering the holes on a D whistle. A smaller whistle may be a good idea in this case, such as a G or an F. One nice thing about whistles is that the major scale is fingered exactly the same on any key whistle. This means that you could still properly play the tunes in any tutorial, but the pitch would not match if youre playing along with a D instrument or a tape or CD. See the next question for more on different keys.

Website: http://www.thewhistleshop.com/