How to grow your own protozoans–making a hay infusion

The following video will show you how:

(Note especially: Use a natural source of water. Do not use tap water, which contains chlorine.)

Kids may ask: Since the grass/hay they started with was dry, where do the bacteria/protozoans they find come from? (Think and discuss) Yes, these organisms can exist as spores in the dry state. The fact that they come to life out of any handful of grass shows how widespread in the environment they really are.