Has anyone here ever lost a typical tank to breakage? Something like the 3footers with 10mm glass.. I must admit that I am a bit nervous as I have a 5yr old that often has other 5yr olds over for sessions of running around the living room going nuts. How much of a smack can these things take? I'm thinking worst case scenario a metal thomas the tank engine train gets chucked at my tank or something like a stick sword whacks into it. I've asked the wife to keep close watch over the tank etc. Hopefully we'll be ok :crazy: