Mini wormery

Activity

Learn where a worm likes to live and understand their importance for healthy soil and plants.

Learning objectives

Cut the top off the bottles if pupils are too young to do this.
Use a sharp pencil to pierce a hole near top of bottle to make cutting easier.

2 litre clear, plastic bottles
Safety scissors
Compost, soil or a mixture of both
Sharp sand
A few worms per bottle
Water to dampen layers
Worm food – grated carrot, vegetable peelings, dead leaves or shredded newspaper

Fill the bottle with alternating layers of sand, soil, and compost. Spray each layer with water so that it is damp.
Cut the top quarter off your plastic bottle to make a lid. Make a slit in the side of the lid so that the top can close over the bottom part.
Collect some worms from the garden. Look in the compost heap, under stones in damp places or dig a hole to find them.
Add a few worms to the top of the bottle and watch them burrow down. Then add the ‘food’ to the top. Remember to wash your hands well after handling worms and compost.
Wrap the black cardboard around the bottle to make it dark. Worms do not like light and it will encourage them to burrow around the outside of the bottle so they can be observed.
Place the wormery in a warm place. Remove the cardboard for observation periods and record findings. Check that the contents are damp and that there is food available for the worms.
After one week, release the worms back into the garden.

The layers disappear as the sand and soil mix together and channels appear where the worms have burrowed
The food from the top may be dragged downwards
Do not feed the worms citrus fruits or onions
Use this activity as part of the Earth Matters class growing topic