How to give an object to a sim in a different household?

Thanks for the help everyone!

I was able to move everything by saving a small room to my library with all the military trophies and a couple of photographs. I then went to the household and downloaded the room, and I put all the objects where I wanted them.
So it worked! :)

….I still am a bit skeptical of gift giving, it doesn’t seem to be 100% reliable.