Does the dye stain?

 The 3-year-olds have experienced the power of the dye. For this, 3 different colors have been used: green, blue and yellow. The children poured water into 3 different glasses and then poured dye of the different colors, one in each glass. Once the water was dyed, a ball of white cardboard was placed inside each glass. Students took it our 5 minutes after putting it in. They could observe that, although it was very slight, the paper had begun to change color. It was decided, therefore, to leave the balls inside the glass overnight. The next day, the children could see how, after some time, the paper had changed color.