Rise of Fascism. As the United States turned inwards to deal with the lingering effects of the Depression, militaristic regimes came to power in Germany, Italy, and Japan promising economic relief and national expansion.
Human faces are one of an infant's favorite and fascinating things to observe, especially when it's mom or dad or his own image staring back at him in a mirror. By 3-months-old, most babies know the difference between familiar faces and strange ones.
Many babies' first steps are taken around 12 months, but earlier or later than this is completely normal. By the end of this stage, babies begin to use the pincer grasp, using the thumb and first or second finger to pick up small objects.