Building a miniature ecosystem is a wonderful way to observe how light and photosynthesis help to keep plants and animals alive. This project is super simple, easy to put together, and a great learning experience for your kids. Here’s how it works:
What you need:
- 2-liter bottle
- Elodea (small plant that should be available at aquarium/pet store)
- A couple of small snails (should be available at aquarium/pet store)
- Optional: 1 feeder guppy (should be available at aquarium/pet store)
- Small rocks
- Dead leaf
What to do:
- Fill the bottle ¾ of the way to the top with water. Let the water sit out for 24 hours to let the chlorine in it evaporate (otherwise your snails will die).
- Add about an inch worth of rocks to the bottom of the bottle and the dead leaf.
- Add the elodea, make sure your separate the pieces if they are clipped together.
- Add the snails and the fish.
- Leave the bottle to sit for 24 hours and then put the top on. Put it somewhere that get direct sunlight for a couple of hours a day. You should start to see bubbles of oxygen from the elodea, snail eggs, new leaves on the plant, and other little life activities.