Sleep, please, just sleep!

There has got to be a better sleep solution. I can get the girls to all go to sleep in their own beds, but am fighting a losing battle around midnight. Two of the girls continue to wake around that time and wander into our bed... Eva every night, and Eli sometimes. It's really not a problem, unless they both decide to come in on the same night. Then they spend the entire time pushing and shoving each other, and arguing with each other. I cannot sleep in these circumstances. Let me repeat that, although what good it will do I don't know, since they are my non-readers and will not read this anytime soon! But I repeat...I cannot sleep in these circumstances! It leaves me cranky and without the small amount of energy that I would typically have, which is barely enough to function as it is. I have tried putting them back in their beds, but that ends in hours of crying and drama that ends up waking the rest of the house. I know this is a common occurance in many homes, but don't want it to be one in mine any more! On a good night's sleep for me all I want to do in the morning is stay in my jammies and lay on the couch. And now that's REALLY all I want to do today. Not gonna work, girls. It's just not gonna work. Hmmmm.