Folktales make great webquests and intertextual projects because there are so many of them that go together (they have
even been classified into "cycles") and because a lot of them are out of copyright and available on the Internet for nothing!
Also, students of all ages can work with them easily because they tend to have "databases" of these storie in their heads.
Folktales make a great place to start bookweaving.
This site has links that organizes folktales by their numbered cycles and connects the reader to a variety of tales of
each type from different cultures.
Even if you don't want to do this particular lesson plan, there are plenty of online sources for folk tales.