I've done several ROKR puzzles/models, and they are all high quality and fun. The train has more parts and takes longer than others (which is a good thing -- more fun for the money). It is well built and very enjoyable to assemble. No glue was needed; all the parts fit well. It is probably a bit difficult for a child to assemble without help, and several steps require force that small fingers surely can't muster.
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