Every time Mom and Dad go to work, the most important thing they miss is their children, and when they think they're going to be alone all day waiting at home, many parents hate to rush home!
In the film, the authoritative experts, together with Mao's parents, used the hidden camera to see what the children were doing when they were alone at home, whether they were screaming or not, and to find solutions together. The first couple in the film, Nancy and Alex, went through the camera with authoritative experts to see how their commodity, Max, was at home.
Max, when he pulled the horses out, he started screaming. I'm sorry.

Max runs around with constant anxiety and sometimes continues to cry and feel very sad...

It's alone at the door, waiting for Mom and Dad to come home.