For use in a pool or a lake?
Well there's a ponderous battleship cheapo boat on amazon that is unlikely to offend and might be easier for a 5yr old to control
I'd be surprised if there would be any problem with sailing them on canals, with the exception of needing to be conscientious about the noise proximity to people living on canal boats.Have any of you tried using them in a Canal? Will someone still complain?
I saw a few people that seemed to be a club with model boats in the canal at a marina not far from me.