I have the following three stories about the Story of Nian on my iPad (each one is currently available for purchase at $0.99 each in the App Store).
The Tale of Nian from Hongen Education and Technology
https://itunes.apple.com/us/app/the-tale-of-nian/id464210134?mt=8
This one is in Chinese, with Chinese character subtitles. It is an interactive application with clickable pictures on each page.
Nian is Coming, from 5Q Channel (Lu Feng Technology)
https://itunes.apple.com/app/id412372054
This one is only in Chinese, but there are some different presentation options--from playing it straight through as an animation, or reading with subtitles, either simplified characters, or simplified characters with pinyin. I personally like the animation option the best, though.
The Beast Nian, by RyeBooks
https://itunes.apple.com/us/app/ryebooks-beast-nian-by-rye/id396384621?mt=8
This app has a language selection option, for subtitles and narration, with the choices English, Chinese, Japanese, German, French, or Spanish.
For the Lantern Festival, I use a different app from 5Q Channel, called "The Legend of the Lantern Festival." The animation is very well-done so I stop it between scenes and have the students describe to me what they think is going on.
https://itunes.apple.com/us/app/chinese-reading-legend-lantern/id413196096?mt=8
I was a little late getting these app recommendations posted for you, as Chinese New Year celebrations are now over, but I hope they are still helpful!