Whatever you might think about the idea of legalizing marijuana use for adults — California voters will decide next Tuesday whether or not to do just that — you probably don’t approve of giving pot to children, especially pre-teens. If you’re a parent who doesn’t want their kids trying weed until they reach adulthood (or something close to it, anyway), you might want to be extra careful about checking their treat bags when they get home from trick-or-treating tonight.