This document provides an overview of 3D internet, which combines 3D graphics with the internet to provide interactive, real-time 3D graphics delivered over the web. It discusses how 3D internet works by using virtual platforms like Second Life and augmented reality devices. Some potential applications of 3D internet include e-commerce with virtual stores and product demos, gaming, education with 3D data visualization and virtual field trips, and entertainment like streaming 3D animation. Challenges to implementing 3D internet include the need for high bandwidth and specialized hardware, but solutions involve using technologies like 3G internet and augmented reality devices like Google Glass.