this is an instructable on how to make a simple irrigation system out of:

paper or plastic cups whatever you choose is up to you.

straws or tubes or pipes or whatever.

a pencil.

a thumbtack or a drill if you use plastic cups.

Step 1: Poking Holes.

Take the pencil and poke holes near the bottom of the cup so that the straw will fit in the hole snug, repeat with the other cup.
<p>I used this with my 5th and 6th grade engineering class as an introduction to the irrigation system they will design and build. Turned out to be a really cool and quick lesson. Thanks for posting!</p>
Why fill just one cup with water?
haha, i've been thinking about this since seeing arthur and the invisibles

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