この箱には何が入ってると思う?

English Translation

What do you think is in this box?

It sounds like the audio says “bako.” Is that right?

@chezvouscf
この箱 should be このはこ (kono hako), not このばこ (kono bako).

ばこ is used only as a form of combined words such as;

  • 救急箱 (きゅうきゅうばこ) - aid kit
  • お賽銭箱 (おさいせんばこ) - money box for donation set in Japanese shrines
  • 目安箱 (めやすばこ) - box to file your petitions or opinions usually to government agencies