Learn Russian: Малыш упал, разбил себе губу и заплакал. - The toddler fell, busted his lip, and started crying.

This is a great example of the Dative of inalienable possession. In Russian, when an action affects someone's body parts (especially injuries), we don't usually say "broke his lip." Instead, we use the dative case to show who suffered the detriment—in this case, the reflexive pronoun себе (to himself). It feels more like he "busted the lip to himself."

I usually translate разбить as "to break." Do Russians really say someone "broke" a lip?

Yes! While in English you might say "busted," "split," or "cut," Russian commonly uses разбить for injuries caused by blunt impact. You'll often see this verb used with body parts that get smashed or bruised, like разбить нос (to bust a nose) or разбить коленку (to scrape or bust a knee).

Does the prefix за- in заплакал change the meaning from just "cried"?

Yes, it adds the meaning of "started to." With many verbs of sound, speech, or emotion (like crying, singing, or talking), adding the за- prefix creates a perfective verb that specifically signals the beginning of the action. So плакал is "was crying," but заплакал is "burst into tears" or "started crying."

Why are all three verbs (упал, разбил, заплакал) perfective?

Because they describe a chain of consecutive, completed events. The toddler fell, and as a result busted his lip, and then started crying. Using the perfective aspect for a list of past tense verbs is the standard way to tell a story where one finished action leads directly to the next.