If you are looking for an app to prepare an ePub for a children's book, Book Creator app for iPad produces a beautiful ePub3. We varied the font and font size, boldness and color. We chose a square book format, but other shapes and sizes are available. We were also able to choose page color and vary page color throughout the book. We included a short video, in lieu of an illustration on one page. There is the option to narrate your book or have the app narrate it and light up the word being read. There is an automatic page turning option. Air dropping illustrations from your iPad or iPhone is very easy. For book 2 in our series, we are doing more illustrations directly onto the iPad/book creator page with a stylus. For our needs, the app is easy to use and offers all of the features we needed. We have been asked to conduct a seminar for teachers and writers on preparing an ebook with Book Creator for iPad at a local college next month.
The only problem we encountered was submitting a table of contents to Apple's iTunes Producer. There were instructions in Book Creator for preparing a TOC to submit to Apple, but we did not get it right. The folks at Apple were nice enough to redo our TOC.
UPDATE: The first three multi-media books in our series are in the Kids section for ages 6-8 on the Apple Book Store. With each new book, we have found new ways to creatively use the features of this app. As requested by teachers, we are now preparing a read-aloud format of our books for children who are younger than 6, struggling a little with reading, English language learners, or visually impaired. We are using the "add sound" feature of Book Creator with an iPad headset. Our narrator is awesome, but the "light up words" and "automatic page turning" features of the app only work with the digital voices the app provides, which lack expression and phrasing. Any new developments in the works to enhance making read-aloud?