1) In the joint family, all members are equally sharing all expenses, works and another thing with the other members of the family so the burden of work will not be felt by any single person
2) All children get an equal share of love, care, guidance and education by the elder grandparents so that they never miss anything in their whole life. Similarly, they can also easily get help from their parents.
3) Small children will gt teaching guidance from their uncle, aunts and other family members. THe sharing resources with the cousins and sister help parents to decrease the expense on their child.
4) On the eve of big occasions like marriage, birthdays, engagement, anniversaries, etc, the work can easily be shared with all members so that the event will be successful. This will bring down the burden from their parents.