I have been testing some animation tools on the iPad. Even though it is pretty difficult to handle with current digital pens I have found it very fun to use for quick playful short animations.
It is created with Animation Creator HD for iPad:
2d Animation On Ipad
Thank you.
I am using Bamboo stylus. Not the latest version though. Even if I have the latest one there is not such a big difference. What is good with that pen is that it have high sensitivity so you can keep a freehand. What makes it difficult is that it doesn’t have a tip, so it is kind of a guessing game 
http://www.youtube.com/watch?v=GxZlzdhaVtI&feature=g-upl&context=G2ffc541AUAAAAAAAAAA
Here is my new animation.
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