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Unit 1: Cotton-tipped swabs, 4 cups lemon juice, cold coffee, salt, butcher paper, construction paper, glue, tube of toothpaste, flexible rubber tubing, a marble, iodine in dropper bottle, saltine crackers, small plates
Unit 2: Poster board, different kinds of food (corn kernels, beans, ...
Source: HighBeam Research, Classroom. (Resources).(Brief Article)