Title: Good fun!
Review: I put this together with my 7year old son in a couple of hours. He couldn't have done it himself but it was afun project for us to do together. It's only been up for a couple days but he is really enjoying playing with it. The gears don't always work properly and sometimes the marbles need to be nudged, but I think that is good for him because it makes him feel like an engineer who needs to fix his machine. I'd recommend it!
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