This document discusses the growing field of 3D and 4D printing, highlighting how 3D printing has been used to create jewelry, a car, and a house, as well as how over 800,000 digital objects can be 3D printed. It also introduces 4D printing, where objects can change over time, and profiles Skylar Tibbits, the creator of 4D printing. The document explores how 3D and 4D printing are impacting fields like fashion and describes it as an amazing new world.