To expand our undergraduate laboratory curriculum, we are developing experimental sessions that encourage students to cultivate their own experimental inquiry and involve them in experimental design. Towards the end of a 2-semester general chemistry sequence, one laboratory session is designated for exploring chemical reactions involved in denture cleansers. The goals of this session are (1) to stimulate students to observe chemical systems and to formulate their own questions about these systems, (2) to give students an opportunity to propose their own simple experiments that focus on testable parameters, and (3) to introduce students to chemistry of oxidation-reduction reactions used in dental health care products. Initially, students are provided only with denture cleanser tablets such as Efferdent, a beaker of water, and a timer. After making initial observations, students are asked to generate a list of questions and to propose how they would study parameters such as pH, temperature, rates, concentration, etc. using simple materials and equipment available in the laboratory. Proposals for identifying the gases released and the components that change color usually necessitate the use of textbook and internet sources. Such activities introduce undergraduates to concepts in experimental design, which they might implement in additional laboratory sessions. Furthermore, the choice of commercially available denture cleansers provides an opportunity to review the oxidation-reduction reactions of peroxide compounds and their important role as bleaching compounds and anti-bacterial agents. These exercises give students segue to experimental design in research and to the chemistry of everyday health care products.