Just when you think you’ve seen it all, you get the Flippity Fish cat toy from JML. I just saw it advertised on TV, and I laughed out loud.
Actually, it looks like great fun, and I bet cats will love it, too.
Incidentally, it looks like JML have got into something which has been available for a while – you can buy these fish on Amazon, and some of them look very similar. There’s also a lot of other cat toys which have movement.