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bottle ecosystem... look like some great windowsill project.

sci project, mini ecosystem

Self Contained ecosystems in a bottle, perfect for a hand on science lab.

Self-contained Ecosystems. I would use "sea monkeys" instead of guppies on the bottom....

bottle ecosystems, I remember doing these in 5th grade...I wanna do these in my class!

pot plus top of pop bottle = homemade terrarium

Ecosystem!

Water bottle fountain ~ States of matter ~ the air from the balloon pushes the water out through the straw!