Who are the 3 kings?

Your question is somewhat vague.

There were many kings mentioned in The Bible.

You probably referring to the first three kings in Israel. Those are : Saul, David and Solomon.

If that was not the answer you wanted, please edit your question or post a more precise one. Maybe the three kings came to the stable when Jesus was born. The three kings came from Persia now Iran, Melchor, Baltazar and Gasparwhich offered gifts, Myrr, incense & gold.