This child's family was probably not particularly wealthy since there are only a few objects. The brooch is made of iron instead of bronze so would be less expensive.
The child was wearing some form of clothing which required a brooch and therefore may have been wearing a cloak.
The family cared for this child because there were objects buried with him or her.
The knife suggests this child was not a slave.
These objects do not tell us:
The sex of this child.
How old the child was when he or she died.
How healthy the child was when he or she died
The cause of the child's death
Archaeologists need the skeleton to be able to answer these questions.