Answer:
I do not think that you should know everything.
Explanation:
The reason i dont think you should know everything in kindergarten is cause since i do not have any evidence for you sentence, i think that in kindergarten you should know your basic alphabets and not to much of math but atleast 1 plus 9 and like 3 plus 3 and basics.
At first Arturo does not want to go because he rather study then visit his grandpa in the dreadful old's folk home. When he first arrives he keeps checking his watch eager to leave. After Arturo listen's to his grandpa's life story he does not want to leave because he wants to learn more about his grandpa.
This is the best I could find for you