But how would a blind or visually impaired child learn from such books?

To help children with visual impairment have the same learning experience, a team at University of Colorado has started a new project called "Tactile Pictures Book Project" that prints children's books on a 3D printer and raises all the images, so the children can feel them with their hands and understand what the objects are. These images have good detail, and are almost exactly the same as their 2-dimensional printed counterparts. The accompanying text is printed in Braille so the children can also read along with feeling the images.

However, children's books have a lot more than just a combination of static images and texts. Some of these books are much more interactive - they have flaps that open and close to reveal other items underneath, feature other objects that move, spin, swing and can be pushed and pulled to teach various concepts and techniques to children. Can all of that be done with a 3D printer?

Absolutely. The software can imitate everything that the printed book has and 3D print the same features, thus making the experience for the blind child very much the same. The team is also working on 3D printing comic books and textbooks in a similar way.