our hens aren't being very successful, They have layed on two or three nest and none hatched.
So we are going to make an incubator and take their eggs.
Does anyone have any good CHEAP chicken egg incubator ideas?
Do a search here on BYC and you should find many ideas for an incubator. I would research the reasons behind these designs, too.
As for your recent eggs not hatching. Did the hens go broody and sit on the eggs for two to three weeks? Are your eggs fertile?
Btw, you can go here to the Incubator listing and find all kinds of DIY ones.... :)