Where is popo?

JJ: Mom, can I see snow? I wanna see Santa Claus.
M: It's not snowing here. Next time we go and find popo, it's snowing there..
JJ: Mom, where is popo?
M: Popo is in the United States.
JJ: Where is U...ted States?
M: It's America.
JJ: Same like the movie? Like the Captain America?
M: Yes.. (the only relevant America to him is Captain America)..