All organisms are affected by "scent" molecules in the environment. Ants find a picnic lunch, people get attention by the cologne they use, and we all want to go into a bakery that smells like fresh cookies. Allow your students to have the wonderful experience of working with a multicellular organism called Caenorhabditis elegans which can be attracted to a number of scent molecules. These worms are composed of 959 somatic cells of which 300 are neurons comprising organs for tasate, smell, temperature and touch. In this experiment your students will explore the positive and negative chemotaxis in C. elegans in response to volatile chemical compounds like vinegar, vanilla, bleach and acids.