Graphs of functions and other mathematical objects can be easily manipulated with the aim of producing mathematical models for cartoon images or other images. Experience showed that this can be an excellent pedagogical tool to approach several subjects in basic and high school mathematics. This is a hands-on workshop where participants will be faced with different activities that can be used in classroom. Although any dynamic geometric computer program can be used for this propose, the activities in the workshop will be done using GeoGebra.