Zuuka group, which developers interactive entertainment apps and ebooks for kids, this morning announced that it has raised an undisclosed amount of funding from venturecapital.de, High-Tech Gruenderfonds and unnamed angel investors.

Last year, U.S.-based FrogDogMedia and Germany’s zuuka joined forces to create what is now one of the world’s largest publishers of mobile entertainment products for children. The name zuuka Group was chosen for the combined entity, but the company uses iStoryTime name as its flagship label and joint brand.

iStoryTime is a library of mobile children’s book apps, but zuuka Group also publishes the iTalk entertainment apps and zuuka Comics.

The company’s apps and ebooks are available for the iPad and iPhone as well a variety of Android devices. Zuuka develops titles for several major digital mobile licensing partners, including Harper Collins, Nickelodeon, Random House, Cartoon Network, Sony Pictures Entertainment, and more.