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Title: Impossible to use
Review: I bought this for my 10 year-old son. He's an experienced builder, having put together many lego creations and k'nex kits with little or no help from a grownup. He couldn't assemble the tanks. The green collars that are used to connect tank sections are very tight (to keep water in, I suppose), and he just didn't have the coordination or strength to push them together. I was able with much, much effort, to get two sections of a tank connected, but I couldn't even get the top on.I called the help number and left a message. So far, no response.The girders are also not very well designed and come apart with a little jostling.I wish I'd never bought it. My son really, really wants to see it work and so far we've spent many hours to no avail.
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