Three easy ways to build a worm farm

Worm castings are black gold for the garden, they are absolutely packed with the good stuff that makes our soil sing and are moisture and nutrient magnets! A slosh of diluted worm castings and water onto a tired pot plant can help it re-wet and re-invigorate it.
Composting worms are not fussy and there are several ways you can harvest the rewards of their hard work. All they need is food, water & shelter - Millie shows us three different ways of making the worms welcome at your place without the need for a fully constructed farm.
A Way with Worms # 1 - Potted Paddock
Millie runs a simple, no fuss, free-range worm farm in a large plastic pot which is dead easy to replicate at home.
Materials Required:
One large plastic pot
Hessian (or similar) to cover
Avery mesh (optional)
A Way with Worms # 2 - Free Range Farm
Materials Required:
Bucket with lid
Drill and bit
Shovel
A Way with Worms # 3 - Polystyrene Palace
One down side of the potted paddock and free-range worm farm is that you cannot harvest the liquid leachate which can also contain beneficial microbes and is absolute gold for your plants. To harvest leachate, you will need a fully enclosed farm - here is how to make one for next to nothing using polystyrene fruit boxes. While these boxes are a bit of an environmental nightmare, they are everywhere, so repurposing them and diverting them from the waste stream is positive - they are also well insulated, meaning they are perfect for worm farm construction.
Materials Required:
Polystyrene fruit box with lid
Small section of hose or poly pipe (about 10cm - 12cm)
5mm gravel (about half a standard bucket)
Shade cloth or fabric
Bedding material - compost, coco fibre, rotted leaves
A handful of worms and castings
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[@samktlau]

Hi madam, may I know why not need holes in the polystyrene box bottom ? Water will stay below the hole with tube. I am a retired senior living in NSW and a new hand of gardening. Please forgive me if my question is stupid.