Passover postcard

The postcard depicts six children sitting and standing at a table during Passover in Rīga, Latvia, in 1939. The two boys in the picture names unknown and Lea Lemchen, age 7, [2nd row on the right] were killed in the Rīga ghetto in 1941. Bluma Sandler, age 4, [donor's cousin / seated on the right] Sara Cherfas, age 3 1/2, [donor / seated in the center] and Ester Wishnevskaya, age 7 [donor's father's cousin / standing in the center] survived by escaping from Latvia to Russia with their parents.