The Sneetches by Dr. Seuss is always a favorite because it can be used with any age group from kindergarten through high school. This is a wonderful story and a perfect example that really pin-points how ridiculous discrimination really is. This book is about discrimination based not on religion or race, but on belly stars.
Kain [kain] as a boys' name is pronounced kayn. It is of Hebrew origin, and the meaning of Kain is acquire. Variant of Kenan. Biblical: refers to the tribe of Kenites or to a city in Judah. See also Cain. Also form of Kane.
Kai is a Dutch, Finnish, Frisian, German, Scandinavian, and Welsh name of Latin origin. It is derived from the element 'gaudere' which means to rejoice. Caius (Latin) and Gaius (Latin) are old forms of Kai.