The 'Family Bed' is a bed used by the whole family.
This arrangement is also known as 'co-sleeping'.

There are some different 'levels' of a Family Bed usage, like:

1. ('Initial':) A baby sleeps, in a separate crib, next to parents bed.

2. Baby or child is put to sleep in his own bed.
    Early in the morning or in the middle of the night, he moves to the parents bed.

3. Baby sleeps in parents bed.
    At some age (6 month, 1 year, 3 years or other), the parents move her to her
    own bed.

4. ('Advanced':) All children are allowed to sleep in the Family Bed whenever they
    like.
    They can decide if and when they want to sleep alone.