We studied Egypt in 1st grade too, but didn’t use Module 1 because I hadn’t found SCM yet. Our favorites were:
1. Mummies, Pyramids and Pharaohs – Gail Gibbons
2. Ancient Egyptians and Their Neighbors – Marian Broida
3. Egyptian Diary: Journal of Nakht – Richard Platt
4. Mummies Made in Egypt – Aliki
5. Mummies in the Morning (Magic Tree House) – Mary Pope Osbourne (twaddley but usually available)
Do you need Rome and Greece or is that a different module?
You can read my reviews of the books we read for “ancient history” here. http://www.goodreads.com/review/list/1212796-heather?page=1&shelf=ancient-history