@ossobuco,
Thanks guys....wasn't sure if anyone was interested.
Been on a toy mission.
I'll post pix of what I bought when I am on computer not iPad.
Success...at least so far.
I got something pretty similar to what rock head posted, which has attracted both of them. I also got a thing a bit like a plastic x, which attaches to a stand in the centre. You attach sticks with balls and feathers on them to the four arms, and there are two little balls running on tracks within the x, which kind of wobbles as the thing is played with, so the balls run up and down.
I hear sounds of play as I type. The balls they can't get at seem a real hit!
The nicknames at present are just standard cat love talk....