Science Project - Forces/Pushing and Pulling/ Water Pressure

So what 's this cow got to do with water pressure?  Not much really.  The other day  Mr. R and I went for bike ride.  We came across a bridge with water gushing out from underneath.  It's been a very wet Rainy Season so we have had some flooding in the fields around us.  Mr. R loved watching the local boys having fun as they were pushed under the bridge by the water. When we came back home, he was still excited and tolde told his friends and father about it. 

It got me thinking, for science we're meant to be learning about pushing and pulling.  Surely, this is related. Wouldn't be great if we could turn this fun experience which Mr. R  is obviously excited by into a science lesson.  I started to Google up more information and came across this:

When you press or push something, the force you apply is called pressure. Pressure is measured as the force you use divided by the area over which you use it. If you use a bigger force, or if you use the same force over a smaller area, you increase the pressure. We experience AIR PRESSURE all the time because of the weight of air pressing in on our bodies. WATER PRESSURE increases as you go deeper in the ocean.

WATER PRESSURE

Water behaves differently from air when it is under pressure. It cannot be compressed (squeezed). This makes it useful for transmitting force in machines, using a system called hydraulics. Water is also heavier than air, and an increase in water pressure affects humans more than a drop in air pressure. Even with a snorkel or other breathing apparatus, it feels much harder to breathe underwater. The water above you presses down from all sides on your body, so your lungs find it harder to expand to take in air. The deeper you go, the more water there is above you and the greater the pressure on your body.

Liquid pressure is used to carry force through pipes. The small force pushing down does not compress the liquid but moves through the liquid to push another piston a small distance upwards. The wider area of this piston increases the force applied.

http://www.infoplease.com/dk/science/encyclopedia/pressure.html#ESCI075WATPRE

Today we went back to the bridge.  Unfortunately, the rain has stopped and the sun is out, so it wasn't quite as exciting as a few days back.  Still we could see the mark on the concrete where the water was before and could note how much the water level has dropped.  We noticed the water wasn't rushing out from under the bridge anymore, instead it was slowly flowing. 

Mr. R took out the camera (ICT link!!!) and filmed the movement of water under the bridge.

I've also come across some pretty cool science experiments on the topic, which I'll share later.