My son asked me for either a Harmonica or a Saxophone this weekend....well I ebay searched a Sax as I love the sound of those...and they are not in my price range LOL so I am thinking about getting him a harmonica....or a set of Harmonica's

Do any of you dabble in Harp? He likes blues so I am sure that is where he is heading with this....any thoughts or suggestions? Brands? Keys?

I know nothing about them...other than I really like to hear them in a good blues tune.