First off, I know that the world turns around me and I know everything about the world.
For example, my papa has a beard and so every man I see with a beard must be a papa.
Next, about toys! My toy room is upstairs, so every house with stairs has a toy room- and I know where to find it.
Of course, I certainly know who my mama is, because every time I call “Mama, Mama” she shows up.
What more is there to know?
Just wait until next year!