He is absolutely manic with excitement - despite this year knowing for sure that Santa isn't real. He hasn't stopped making noise since about 9 o'clock this morning, has been jumping around like a loon, has spent the last 10 minutes singing a song to the tap on the bathroom sink (yup!) and has gone upstairs with his empty stocking on his arm, pretending to be a snake! 
Is it really so bad to give children sedatives? Some valium, for instance...
Although tbh, if I actually had any valium, I would probably be taking it myself tonight!