Here's a great hands-on introduction to chemical reactions and reaction types that also saves money and planning time. The bundle includes 1 teacher demonstration kit, Carolina Chemonstrations®: Metal Activity Series (item #840319), and 2 classroom lab kits, Carolina ChemKits®: Mystery Chemical Reactions (item #840660) and Carolina ChemKits®: Types of Chemical Reactions (item #840740). Classroom kit materials are sufficient for at least 30 students working in groups.