Jabari is playing with trains and Dana snatches the train, since he is playing, he will be a kid, and kids are often get angry when things are snatched from them.
Anger is an emotion that occurs when something does not seem right to you or when someone provokes you.
Children frequently become enraged or cry, when they do not get what they want. As in the story shows, Jabari and Dana are brother and sister, they are just character to show the anger in children, who are playing, in which Jabari is a very outrageous child.
Thus, Jabari is playing with trains and Dana snatches the train, since he is playing, he will be a kid, and kids are often get angry when things are snatched from them.
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