I recommend a great workbook for leaning Kanji 漢字 to people who are learning Japanese 日本語. A unique thing about the workbook is that the sample sentences includes Kanji.
All sentences are about poo-poo.
The sentences sound funny, especially for kids. So that makes studying Kanji a bit easier since it is funny and easy to remember.
うんこ 漢字ドリル 1~6
Unko kanji-doriru vol.1 – 6