I play the saxaphone so my kids always want to join me when I play music.
I have a 2 and 4 year old so I bought 2 of these and they love playing them.
Neither of them have any issues playing them, and they seem pretty tough.
My only issue are the notes are the wrong way round (lowest at the top, highest at the bottom), but the kids don't notice this so it's not a major issue (just takes a couple of seconds to work out a tune on it if you play it)
They are loud enough to make some good music, but not so loud that you'll regret them playing them!
Great purchase for kids interested in music!