The Kingdom of Childhood, a cycle of seven lectures (with Q and A) by Rudolf Steiner. Given in Torquay, England from 12-20 of August, 1924. (CW 311)
For your convenience, below is a zip file of this entire set of lectures. It does require that you have an unzipping utility of some kind on your computer. For you mac people this is built in.
The Entire Book The Kingdom of Childhood
1. Lecture 1 (August 12, 1924)
2. Lecture 2 (August 13, 1924)
3. Lecture 3 (August 14, 1924)
4. Lecture 4 (August 15, 1924)
5. Lecture 5 (August 16, 1924) with appendix on Theorem of Pythagoras
6. Lecture 6 (August 18, 1924)