how to deal with bedtime behaviour?

[familyfun]

dds share a bedroom and since stopping night bf, we now put them to bed at the same time.
they are both tired but once they get in the bed and cot, dd1 starts making silly sounds or flinging her hands up and down so dd2 joins in or sits up to look and laugh.
do we need separate bedtimes? discipline dd1 somehow? short of hissing shut up at dd1 when she suddenly squeaks loudly im not sure what to do. or just shut door and see how long they annoy each other before sleep?

dd1 is 4.10, dd2 is 1.6, they are in bed by 7.30 both shattered.

also, how do you discipline one child without other child missing out too. eg with just one child you can say anymore naughtiness and no park/swimming/treat tomorrow, but now it seems like dd2 often misses out on an activity due to dd1 messing about.
thanks

I'd put dd1 to bed first (I know the eldest usually goes second) so she can go to sleep, put dd2 up when dd1 is asleep. Make some excuse to dd1 about dd2 being only a baby so needs to have nappy changed, last feed, etc. Might be a bit difficult but at least dd1 wouldn't be able to entertain dd2.

thats what ive always done, put dd1 to bed then bf dd2 downstairs and put her up after. but since stopping bf, ive given her a cup of milk with her sister, they have shared bedtime stories, then gone together which i thought would be easier, maybe i was wrong??