Science Experiment ( Amazing Capillary Action)

This experiment is super cool I hope you enjoy it as much as I do.

                                       You need
                    Plastic cups  #5
                    Food colouring  #3 different colours
                    Water
                    Paper towels  #4

            Science behind it all  
    The water is attracted to the water molecules          inside of it.
   Also the surface of solid creates surface tension.
                                  Steps

1. First turn your paper towels into rectangle shapes.
2. Next pour some water about 3 cm up your cups but leave 2 empty.
3. Now add one drop of colour into the ones with water.Repeat it three times.
4. You line your cups up ,Plop your paper towels  into the cups  it should look like this...(make sure that heir an upside down V shape)
   

Question:

Why does they water on the tissues go all the way to the top?

Answer:

Because the water is attracted to the water molecules inside of it.

Hypothesis:

I think that the water thats in one of the cups will run through the other cups and end up in the one without the water.

Observed:

I saw the water on one tissue run through to the next and end up in the empty one and it will mix together.