Ages 10 to adult. Secret languages such as Pig Latin are a lot of fun for kids. Here is a whole book of them, Iggity, Ku, Obby-Dobby, B Language, The Cat's Elbow, King Tut, and others, with a short introduction and riddles and rhymes to practice each one. A Kid's Book of Secret Codes, Signals, Ciphers, Fun with Codes and Ciphers. Each volume lists questions based on Bloom's taxonomy for 50 familiar children's stories.
Excellent introduction explains reasons for and how-to's for asking provocative questions.
Guidelines for generating questions. The next three books are some of the nicest poetry books we've seen. Each one has an introduction to the author, lovely full-color illustrations on each page, and a selection of poems thoughtfully chosen to appeal to young people. Each contains a glossary of unfamiliar words. Poems of Robert Frost for Young People.