Woodlice and choice chambers
A choice chamber allows invertebrates (animals without backbones) to show us which environment they prefer.

The chamber has a plastic bottom divided into 4 parts. You can add moist cotton wool or silica gel to provide a damp or dry environment.
You can also use the chamber without putting anything in here.

Attach a piece of gauze over the top of the divided chambers for the animals to walk on. If you have put damp cotton wool in the bottom chambers be careful not to get the gauze wet!
Put the lid on top of the gauze to hold it in place.
Put the animals into the chamber through the holes

To give the animals a choice of dark or light put black paper over half of the choice chamber once the lid is on.
To give a choice of dry or moist, put some damp cotton wool under one half and silica gel under the other.

Before you start!
Decide whether you want to offer the choice of damp or dry? Or, light or dark?
How many woodlice do you think you need to use to be sure of your results?
How long will you leave your experiment?
Will you repeat your experiment?