The walking water. Experiment with water for children to play with colors

We suggest you do an experiment with really surprising colors. We can call it something like "The walking water." Actually, it is a metaphor. The water in this experiment will pass from one side to the other thanks to the particularities of the material that we are going to use as a transmission vehicle: absorbent paper napkins.

Your child will see how secondary colors are created in an almost… magical way !! Find out here how to do the walking water experiment, a water experiment for children with which they will also learn a lot.


  • Plastic cups
  • Red, blue and yellow dyes
  • Water
  • Absorbent paper

Enjoy trying with your child this home experiment, so simple, fun and educational. You hardly need materials and the result is spectacular. With a little patience, you will achieve an amazing experiment. Write down how to do it, step by step:

1. Place seven glasses in a row and pour water in the first, third, fifth and seventh. Fill them to the top.

2. Add 5 drops of red food coloring to the first glass and the last one as well. Add 5 drops of yellow food coloring to the third glass.

3. Finally, add 5 drops of blue food coloring to the fifth glass.

4. Take a few sheets of absorbent paper and fold them in half and fold again lengthwise. You must place them from one glass to another, so that it connects each glass with the next.

5. You must do the same with all glasses.

6. Observe what begins to happen with the glasses. The colored water begins to creep down the paper into the next glass. The water will begin to descend into the empty glass next to it. The two colors begin to mix in the empty glass. You should let about two hours pass to see the complete result.

This really is a fascinating experiment. But ... do you know why this happens? Paper is made of fibers and water can travel through the gaps in the fibers. The holes in the paper towel act like veins and pull the water upward. It is similar to what happens with plants, how the water rises from the roots to the leaves at the top of the plant or tree.

Water can move up against gravity due to the attractive forces of the absorbent paper fibers.

Video: 25 COOLEST Science Experiments You Can Do at Home for Kids (December 2021).