I've got two in particular that are quite fond of it, the others peck at it sometimes. I expected it to be a bigger hit than it was but it's the favorite toy of the two top hens in the pecking order so that might be why the others don't mess with it as much.
I use a wine corkscrew into the core of the cabbage head to hang it, also have a swing, a xylophone, a mirror and plastic cat toy shiny jingle balls - they have a blast with those. That teeter totter sounds like a cool idea.