Infinite.

Taking your granny behind you on your scooty,

 is the best ride you can ever have.

Putting warm oil on her feet as she sleeps at night.

that small joy - infinite.

Watching her eyes  become watery as she remembers old past times.

Asking softly to small grandchildren, if they will recognize when 

they come again after years.

that small ache of heart-  Infinite.