Sick child sings for Pope Francis

(CNN)People often ask why papal trips matter. The faces of the children Pope Francis met at a hospital in Mexico on Sunday are a pretty good answer.

At Federico Gomez Pediatric Hospital in Mexico City, Pope Francis prayed, hugged and even doled out medicine to a little boy.
In the cancer ward, a young patient sang a beautiful a capella version of "Ave Maria" to the pontiff. As you can see in the video above, he clearly enjoyed it.
The Pope is in Mexico through February 17, when he will celebrate Mass near the U.S. border in Juarez. That part of the five-day trip has generated some criticism from GOP presidential candidate Donald Trump.