Based on the context and the answer, generate a question. 

Context: The joy part of today is just seeing them both do things together . Yesterday Alex was trying to get Ethan to play with the cars like he does . Rolling them on the ground under the table at that moment .

Answer:

It is encouraging to see the boys get along and it makes the speaker feel grateful



Why is seeing the two play well together the joyful part of the speaker 's day ?