What does "the three of them" mean in English for Spanish?

In English for Spanish, "the three of them" means:

los tres

Listen to "the three of them": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 4, Level 2, Scene 2
• English for Spanish 4, Level 2, Scene 4