Our son has decided to wake in the middle of the night randomly and won't go back to sleep (9 out of 10 nights he sleeps through). He will kick and scream until you take him out of bed. Do you have any advice on what to do in this situation? I usually calm him down on my bed, sing to him, lie down myself until he lies down too. But once I pick him back up to go to bed, the whole kicking-and-screaming starts all over again.