We bought this camera for our 4 year old daughter. She's getting along quite well with it now, but the menu/operation isn't self-explanatory for such small children, so I wouldn't put the camera in the hand of a 3-year-old! Even adults have to read up on something or experiment a lot if they're lucky.
Now the whole thing is working and I rate the education positively. Absolutely satisfactory for a children's camera. If the camera is not held still at all, the images will of course be blurry, but with a fairly steady hand the images are really usable. Our daughter also manages to take sharp pictures most of the time.
Another positive point in our opinion is that the camera doesn't have any games or anything like that and that was one of the reasons why we chose this K&F Concept. I don't really understand why everything has to have games on it these days. Our daughter should take photos and not play any meaningless computer games. So again, big praise for that.

We can't say how long the camera will last since it's only been in use for a week and a half. In any case, it seems relatively robust.