Their eyes roam or they focus on your clothes, behind you, or off into space. Even when not being confronted, children often look down into their own laps or at their hands, even while talking. Due to these tendencies, the eyes are not very useful as a judge of truthfulness in a child. A child might yell everything one moment, babble incoherently the next, and then decide to whisper for a couple of days. Exaggeration of the movement of the lips and tongue while talking is common, as is speaking very, very slowly or very, very quickly.
Children are spectacularly resilient, recovering quickly from basic bruises and bonks.
They tend to overdramatize any boo-boo for the sake of special attention, which will only be redoubled should an adult dare to trivialize the injury. Once adequate sympathy is forthcoming, however, the tears will clear as soon as the stricken child discovers something more interesting. In conversation, they can leap from topic to topic, suddenly recalling dreams, imaginary things, and pop culture references with no connection to what's being discussed. They have an irrepressible need to find out how things do what they do, which is why they often disassemble objects. Rarely taking into consideration the consequences of their empiricism, they sometimes like to find out how many times something can be flung to the concrete before it breaks.