Hi - from my experience, I don't ask for changes in the arrangement I have with my EX.

A new bed might sound exciting to you all at the moment, but if it's going to cause crap, then it's not worth it. It won't be the first or last time you won't be able to share something special with them straight away on your terms.

Don't make too big a deal about them not being there, as much as you want to, they pick up things so quickly. They might feel bad that they were not with you and the beds because they were with their dad and that has nothing to do with them. It's hard sometimes, but someone has to be the adult.