This is probably the most critical step. At some point, if your foreman is a 4 year old, you may want to have something handy if the occasion arises at some point during the build that he decides he is bored watching you smooth out the drilled holes w/ the razor prior to adding the screen, or whatever. I used a Nintendo DS.

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That is just about it. We are letting our bin, fester in the garage for a week or two before adding the worms. For one, to order them online they are about $30 per lb. I will be looking for them locally, and will update as to where you may be able to find them generally. All set up, your farm should look like this. Note, (although it's hard to tell, my bins are angled forward to aide in water drainage, I used taller PVC pieces on the back.)

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And a diagram kind of showing the idea of how this is "supposed" to work.

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This is a live action work in progress folks. I will update down the road when we add worms, and then later w/ some results. Oh and you don't need a 4 year old as one of the supplies, but it helps alot, and yours probably won't turn out nearly as good unless you have one!