Room sharing - stop mucking about and go to sleep!

[ThatllDoPig]

How is it done? Started off so well, but now it is as if they have worked out what they can do! And its getting worse, regardless of everything I try. Toddler climbing into the cot, throwing toys, hyping each other up etc etc etc. Any ideas that worked with others. They are 1 and 2.5 . Getting desperate!

Tying them to their beds with rope & duct tape over their mouths?
Could you get the 1yo to bed separately to bed, say 1 hour earlier?

tempting idea ragged!
It used to work putting the baby to bed earlier. Now he just gets woken up. He's now in travel cot in our room and I move him later, but not ideal. Its wierd as they don't have a huge amount of positive interaction in the daytime, but when they are supposed to be asleep they become the best of pals.

Alternatively, get the 1yo to nap longer in daytime so that he needs to go to sleep after the 2yo at night?