Gender: boy
School:
School #13B
I found the birthdate and name by searching the name on the museum database. The time is accurate to the deportation and what his age was so it is accurate.
For the birthplace I Google searched "Chaim Kozienicki+Place of Birth" and it is the second choice down. It is from the USHMM websiteso I feel confident the information is correct.
All of this information was found on a USHMM website and verified. I think Chaim may have written a book, not very popular, but I'm still trying to verify that information.