Includes 3 complete The Young Scientist Club kits in one low-priced set! Kit 4 Weather Station - Young Scientists learn about the weather by making a wind vane to study wind direction, a thermometer to study temperature, a barometer to study change in air pressure, and a rain gauge to measure rainfall. Young Scientists become meteorologists by making their own weather station. Kit 5 Phases of Matter (Solids, Liquids, and Gases) - Young Scientists study the three phases of matter by mixing solids and liquids to create gas, a bouncy ball, and goop. These fun experiments will excite any budding scientist. Kit 6 Volcanoes - Young Scientists learn about the properties of volcanoes by building a simple volcano and mixing the proper chemicals to make it erupt. This will be an experiment that Young Scientists will want to repeat again and again!