Pressure and water painting

Big J pulled this from the same book as our modified penny in a cup, surface tension experiment, Science Play by Jill Frankel Hauser, but again, we modified it for our family. Being not big into messes (and having a somewhat mischievous boy), we don't stock paint in the house. However, we have TONS of construction paper, and water "paints" very well on construction paper.

Hand prints using water on construction paper

The objective of this lesson was to demonstrate pressure and see what it does to water. Big and Little J put a large drop of water on the construction paper and blew through a straw to see how the water reacted. We noted the direction of the water spray.

Then Big J decided to put two similar sized dots of water on the construction paper (close to his hands).

He gave the one on our right (his left) a little blow (barely blowing) and blasted the one on our left (his right) with a big blow. Can you tell how the water drops reacted to his experiment?

J gave it a try too.

Then he decided water painting was much more fun. Yay, for construction paper absorbing water!