Acid, Bases and pH Testing Kit From Universe of Science Basic Acid Test Made for kids 10 and older to use under the time-honored adult supervision, this kit teaches them about acids, bases and pH. Includes 30ml bottles of phenol red and bromthymol blue, 5g each of citric acid and sodium carbonate, plus a 90ml plastic beaker, (10) plastic cups, (2) pipets, a couple of wooden stirs and tiny scoops, plus instructions and a pH chart. Add a touch of PVA (polyvinyl alcohol) and you can make slime, too!