What did the children learn about the past from the old book?

Correct answer: Schools and human teachers

The old printed book gives Margie and Tommy a glimpse of an earlier education system. Its pages describe a time when children went to a school building, studied in groups, and were taught by human teachers rather than by machines installed in their homes. This makes option A correct. The book is not presented as a source of information about flying cars, robot games, or weather machines, so options B, C, and D are unsupported distractors. The discovery is important because it allows Margie to compare her isolated, technology-based lessons with the shared classroom experience of the past. That comparison leads her to imagine that old schooling may have been more enjoyable.