The Question and Answer section for Communist Manifesto is a great resource to ask questions, find answers, and discuss the novel.
I'm sorry, this is a short-answer literature forum designed for text specific questions, This question requires your opinion, If you have any further questions specific to the text, feel free to ask.
I think he might send them to prison to get re-educated. Marx would consider that the parents are clearly lazy and alienated from their responsibilities.
Carl Marx is dead so my take would only be speculation. I'm not a history person but I might think that his philosophy would be essentially the same. He would be critical of the capitalist elite taking advantage of the working man.