An interesting way to grasp data is to hold a model in your hand and experience it in 3D through a paper model. Below is a 3D pie chart visualize using paper.
It was created by Nick O’ Leary, an engineer with IBM in the UK. Nick’s blog is here; he has created a custom bar and pie chart template to make the paper models. An interesting book on the topic is Mathematical Models by Cundy and Rolett, both of whom were influential in the new mathematics in the 1960s in Britain. The book is full of ideas on how to model mathematical concepts using 3d models in paper, wood, and plastic.