Children of Survivors Web Sites
The Cybrary also has a Children of Survivors Section.
There is also a groups of child survivors, who would tend to have younger children. These were more likely displaced children who were shipped out by the parents when given the opportunity.
Once you join a group, you can post an intro of yourself and ask if their are younger children of survivors.
I am currently aware of two such mailing lists for children and grandchildren of Holocaust survivors:
Jewishnet Global Jewish Information Network
Children of Holocaust Survivors Support Groups