Phases of the Moon
Tishrei is the easiest month to start it in since not only do we have Rosh Hashana marking the new moon but Sukkot starting on the full moon I explained to her that it was not a coincident and that this is how the calendar was set up.
I surprised Froggy with a long time favorite activity of school students studying the moon. We made a cookie moon map.
And then Froggy got to build her map. She started with the new moon and full moon since they are the easiest.
To help her understand rather than just memorize the phases,w e read Phases of the Moon and The Moon Book. Phases of the Moon is extremely basic and a nice foundation. Froggy was able to go back over it again and again by herself. The Moon Book is more varied offering information on eclipses and landing and history as well as the phases.