Nothing different than any other children, ancient or modern.
If you are asking which letters are not in the Ancient Hebrew alphabet, there are none. The Ancient Hebrew alphabet is identical to the Modern Hebrew alphabet.
No. Ancient Hebrew is a language, not a place.
No. Ancient Hebrew is a language, and Ancient Israel is nation.
According to the Torah, which person delievered God's laws to the ancient Hebrews?
Ryan is ראין in both ancient Hebrew and Modern Hebrew.
הצלחה (hatzlacha) This word is the same in both Ancient Hebrew and Modern Hebrew.
Shae is a Gaelic name. It has no meaning in ancient Hebrew.
They were the children of the Hebrew people. Today they are called "Jewish children"
They are called the sons of Israel or children of Israel (בני ישראל)
Surprisingly enough, the language of the Ancient Israelites (sometimes called Ancient Hebrews) was Ancient Hebrew.
It's the same in both Ancient Hebrew and Modern Hebrew: ספר החיים (Sefer ha-Chayim)
Ancient Hebrew literature had no impact on Ancient Egyptian literature. The Egyptians were thoroughly not interested in Hebrew literature.