A very good friend of mine is left-handed, but learned to play right-handed from the very start (50+ years ago), since lefty guitars (among other things) back then were even more difficult to find than they are now. If we're talking about a very young child here, that might be an option. The instrument requires learning a lotta detailed hand movements that aren't intuitive to begin with, so it's not like there are any ingrained habits or tendencies to overcome. I'm a righty, but I've always thought it was a little weird that we finger/chord with our left hands when all out innate coordination is in our right.