Welcome to the treefolk, Susan!
Could you give a link to your father's profile? Schneider is one of the most common names in Germany, so every little hint about a place or a ship or the names of his parents or the people he travelled with (as a five-year-old, he certainly didn't emigrate alone) would be helpful in finding an approach to searching in Germany.
Kind regards and lots of fun, help and wonder in the Tree!
Heike