Mol4D, a project of the Centre for Molecular and Biomolecular Informatics (CMBI) at the University of Nijmegen (KUN), is a fantastic interactive organic chemistry educational website. It consists of two main parts: Tutorials and Editor. The tutorials cover numerous organic chemistry subjects including molecular orbitals, stereochemistry, and cycloaddition reactions. The Editor allows users to build their own molecules and create animations of reactions. To view animations and take advantage of the interactive capabilities, students need Chime software. While the site concentrates on organic compounds, the excellent three dimensional models permit students to gain a better understanding of both organic and inorganic chemistry.