From a cultural stand point the film does an incredible job of showing the babies in their natural environment, the crew are mere observers and never interfere with any situation. This is obvious as the older brother of Bayarjal hits the baby every time he passes by the camera and makes him cry, or when Ponijao sits in the dirt and dust with flies crawling on her.
In Tokyo the family spends most of its time with family and friends, and the emphasis is on educating Mari at a very young age. The family from San Fransico seems to be trying to impose a culture on Hattie that is not natural to the United States. In Mongolia, Bayarjgal spends a great amount of time unattended as his family works in the fields. Ponijao spends her days surrounded by women and pretending to work beside them. Yet despite all of these differences each baby reaches milestone at about the same time in their lives.