Instructions
If you are using a water bottle you will need to cut the top of the bottle in order to be able to put layers of the materials inside the bottle.
Start with a layer of soil on the bottom and alternate between soil and compostable material. You can use just about any plant matter. Shredded newspaper would have been great in here too.
When your jar has been filled, add water so it can start composting. You don’t want it to be sitting in water but you do want it to be damp all the way through. You then keep the jar close and use it as an experiment to see how long does it take for different fruits and vegetables to dicompose.