Apart from the regular experiments, it is important to introduce many concepts in chemical engineering through visualization. We have developed a special lab called ‘Demonstration Experiments' which was introduced when this author was a doctoral student and Associate Lecturer (demonstrator). Several concepts when visualized become very clear to the doubting students and they appreciate them greatly. Whether internal circulation in drops, Marangoni effect, similarity between bubble flow in solids or liquids, phase transfer catalysis, these experiments are developed with minimum cost. Over the years, we have made this lab a regular feature and every year we add new experiment(s).