"These features provide an emerging source for reconstructing important aspects of ancient mobility and social and economic connectivity," a researcher said.
Two of the children may have been infant twins who died during or shortly after childbirth, Johan Runer, who oversaw the dig, said.
Archaeologists have found two Bronze Age tombs on the Greek mainland, filled with gold and treasure.
The findings were made at Saqqara—a site that once served as the necropolis for the Ancient Egyptian capital of Memphis.
Videos appear to show protesting elderly residents lying in their coffins in hopes of keeping them.
The tomb appears to be both the oldest and largest of its kind ever recorded in southern Siberia.
Three of the children appeared to have been well-cared for; the fourth did not, possibly due to differences in social class.
The tombs from the 27th dynasty and the Greco-Roman era contain a number of sarcophagi and the remains of men, women and children.