Houghton Mifflin Harcourt has released two Curious George titles as iPad books which are available for sale in Apple’s iBookstore. The publisher used Apple’s iBooks Author tool to create Curious George Says Thank You and Curious George in the Big City, both of which include multi-touch features that let readers participate in George’s adventures.

For example, readers can help George add stickers to thank-you cards, or guide him back to  the man with the yellow hat. The book also feature interactive puzzles, embedded slideshows and comprehension activities. In addition, these titles include extra bonus materials including digital mazes and word puzzles.

“We wanted to create a digital storybook that didn’t distract children from the narrative, but instead allowed them to help the story along by completing activities that are closely tied to the plot,” explained Cheryl Toto, SVP of strategy & planning at Houghton Mifflin Harcourt.