What goes round comes around as illustrated below:

A frail old man went to live with his son, daughter-in-law, and four
year old grandson. The old man's hands trembled, his eyesight was blurred,
and his step faltered.
The family ate together at the table. But the elderly grandfather's
shaky hands and failing sight made eating difficult. Peas rolled off his
spoon onto the floor. When he grasped the glass, milk spilled on the
tablecloth.
The son and daughter-in-law became irritated with the mess. "We must do
something about Grandfather," said the son. I've had enough of his
spilled milk, noisy eating, and food on the floor.

So the husband and wife set a small table in the corner. There,
Grandfather ate alone while the rest of the family enjoyed dinner. Since
Grandfather had broken a dish or two, his food was served in a wooden bowl.
When the family glanced in Grandfather's direction, sometimes he had a
tear in his eye as he sat alone. Still, the only words the couple had for
him were sharp admonitions when he dropped a fork or spilled food.

The four year old watched it all in silence. One evening before supper,
the father noticed his son playing with wood scraps on the floor. He asked
the child sweetly, "What are you making?"
Just as sweetly, the boy responded, "Oh, I am making a little bowl for
you and Mama to eat your food in when I grow up." The four year old smiled
and went back to work.