I was the founder and creative director of TouchPress, so I had a hand in all those apps. For Disney Animated I wrote the text and directed the production. Sadly the business model of $10 interactive eBooks did not work out (unlike $10 static text eBooks, which seem to be much more popular?), and TouchPress was sold (apps and the name) to a company called Story Toys out of Ireland. About a year ago they were bought out by a larger Japanese company, and we were able to buy back The Elements, Molecules, and a few of the other apps, so they are now back to being published by myself and my partners on a low-key maintenance basis.