Mikel Hamer wrote:
Anyway, the girl got a drink and started walking into the living room where we were. She tripped on the edge of carpet and fell down, but she just reached out her hands to absorb the impact.
Of course, trying to absorb the impact of a fall through one's hands is a good way for an adult to sprain or break their wrists. It is safer for children to do so because they have a shorter distance to fall and thus less time for the force of acceleration to take place. This is a case where the natural movement that the child does might be counterproductive for an adult.
Of course, a big part of aikido is refining and and reshaping natural movement. Think about how walking is natural, but an aikidoist reshapes their walking to allow walking to unbalance an attacker.