We have two sons. Eldest aged four, youngest 2.5.
Over the last three months bedtimes have descended in to chaos.
They go to bed around 7pm so one of us will take them up and do Bath, pjs, stories etc. We alternate evenings so it's fairly split between us. The other will tidy up downstairs.
What began as the odd naughty moment before bed has now become standard behaviour every night and it's really wearing me and DH down.
Usually everything is fine until they get out of the bath, but once they're out it begins, screaming, shouting, fighting with each other, running around, jumping on the beds, hiding under the beds so I can't get to them, running in and out of all the rooms upstairs.
If this was for a few minutes it would be no big deal, but it goes on and on, and gets so out of control that they're then wired up and it's impossible to get them in to pjs, and to settle for stories and actually in to bed.
I put youngest in bed first and he keeps running out and banging on eldest door. Eldest thinks it's all starting up again and goes mad with excitement. Which the fires up youngest and round it goes 
I know for some this is wont be an issue but this has happened so stealthy over the last few months that I dread to think if carries on in this vein where we'll be in a years time!
I'm also starting to really dread bedtimes. I love my kids more than anything and I feel awful that every bed times ends with someone (usually me) in tears
Please send any useful advice my way!