The constant violence and the repetitiveness of the plot may make this confusing and questionable for preschoolers, but it'll do a number of good things for school-age children. First, it'll introduce them to classical music (beautiful and timely executed, might I add). Second, it'll give them an appreciation for cartoons made at an earlier time. Third, since Tom always provokes the fights, and yet since Jerry usually outsmarts Tom, kids are taught that the one who provokes fights will usually lose. Last, but certainly not least, it's entertaining. School-age children will enjoy this. As for the smoking, parents will want to tell their children that the dangers of smoking weren't known at the time and that smoking was seen by many back then as social.