Oh god - thank you for writing this post OP. I logged on to look for kid wrangling techniques as my 15 monthers are driving each other and me nuts.
I have been trying to use the step as time out (which worked for my first 2 but not so much for these). I saw a while back Kammy suggested using the stroller.....BUT
my questions are
did they start to "hate" the porta-cots or stroller? Mine already don't really like the porta-cots when we go away and am worried about tainting them (the porta-cots not the kids) more - MILs would be unbearable without portacots. Ditto for stroller - which I can't survive without day to day.
was the "time out spot" whatever it is on a different room? We have upstairs and downstairs and downstairs is all open plan (which seemed like SUCh a good idea before children) except for the toilet. Am loathe to lock them in the toilet

. Seems like that might cause "issues".
what did you do when the victim insists on visiting the offender in the time out zone?
DG - loved the photo - at least the speed bump is smiling.
Anymore more wrangling techniques greatly appreciated. At the moment they are all playing togeher nicely, oops no I lie, they are working together to wreak a trail of destruction pulling clothes off the clothes horse!!
Thanks again - loving all the stories