Here is my farm... it is very successful, and yes, as Catman said, it takes several months before you get to the "large worm" stage...
We actually make it a family event, and my hubby and son get involved in the farm. We think it's fun!
Here a few pics of our farm. Today is farm cleaning day (hubby's day off) so you will see LOTS of "skins" in there. Also, the baby food jars and cup are how I keep the moisture in the farm, without anything getting wet or moldy...
This is a walmart 7 drawer container, with 'extra drawers' from another, because our farm is so successful, we have TOO MANY WORMS and BEATLES! LOL