Basically, these are interactive e-books.
Alice in Wonderland (lite) -Free, but: my kids love this…but want more to it…have to spend the money to get the full version.
Barefoot World Atlas: From itunes: ” 3D globe that invites children to explore the regions and countries of the world, discovering hundreds of fascinating features.”
Imag.n.tron: From itunes: “IMAG•N•O•TRON™, a grand new storybook app experience from Moonbot Studios. It starts with a real or digital book! Once you have purchased your copy of The Fantastic Flying Books of Mr. Morris Lessmore (not included), point the IMAG•N•O•TRON at it and watch the pages come to life.”
Dragonbrush – highly rated book, and at $2.99, not a bad price.