Back when that was written, “vulgar” meant common or without higher purpose or motives. In the context of toys it would be those that don’t spur the imagination, learning, or skill.
Sometimes the same toy can be have a totally different use depending on the child who posses it. We once camped next to a family whose child had several toys and action figures from a movie. All the child could do in play was re-enact scenes and lines from that movie. Our children, who had not seen the movie, saw the same toys and let their imaginations go into all sorts of different directions. They came back frustrated because the first child wouldn’t have anything to do with deviating from the “script”.
