DS1 is 5 and DS2 is 4 and I have to sit with them EVERYNIGHT until they fall asleep, they carry on get up, need a drink, need the toilet etc etc and stall with what ever they can think of. Lots of yelling many nights to get back into bed etc. Some nights I will put lullabies on my phone from youtube. It gets really really annoying as they goo to bed at 1930 but some nights I don't get out of there till 2230.

We have tried rewards charts
Bribary
Separate room
Separate bed times
later bed times/earlier bed times