gift for mother

There was a woman who has three sons.
Many yeas late,they have grown up and went out
They had been successful in about ten years.They discuss what gift their mother need
The first son said: i will bulit big house for my mother.
The second son said:I will buy a beautiful car for my mother to visit many places.
The litter son said:Our mother like reading,but her eyes is not clear,so i want to buy a clever parrot to my mother
this parrot member many stories,it can speak to my mother.
After one year,their write a letter to her sons:
big son:you bulit a big house for me i live one room but i need clean whole room
second son:i am very old now,i have no ability to visit place and the driver is rude
Third son:the chicken is very diliciious.