I just saw this movie on DVD (from NetFlix) and was pleasantly surprised: it's quite charming.
Despite the absence of a plot, you're easily mesmerized by the babies' antics and development.
I was especially intrigued by the vast cultural differences of the babies' environments. Hattie lives in typical American affluence while Ponijao chews dirt in the African desert. Yet, in some ways, life in primitive societies has obvious advantages.
If you're in the right mood, this film can be fun to watch.