The cheaper models are very hit and miss. Most don't last very long, but work pretty well while they are going. The odd one seems to go forever. The dremels are really good and would be perfect for hobby use. I think you're doing it right by starting with a cheap one and if she really gets into it, upgrade to a better one. They are the sought of thing that often ends up gathering dust, but they can be amazingly handy every now and then.