I built this with my 10 year old son (but it was too hard for him so I did 99% but he gave me the parts for each step). 3 major parts broke making it unusable. They provided a small piece of sandpaper, but many of the pieces were too tight and eventually broke. I tried hot glueing a few of these but because they broke there wasn't enough support. It took several hours over 2 days. I emailed the company using the email address provided in the kit and after a few days finally got a response asking for my order number (the email characters were Chinese characters) and after a few days i still haven't heard a beep. I didn't want to miss Revain's return window so I'm just returning the whole kit and everything. What a pity, and my son is such a bum!
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