I have very few accessories. The ones I do have are boy accessories and they are just worn by my boys.
Had I the room for it, I would display the ponies right in/on the accessories! Possibly in the same way it looked MIB.
You can also go with themes. Back when I had the big ole' Butterfly island, I put all of my brightly coloured tropical ponies (even G1) on there.
I filled the nursery up with babies and playpens and bassinettes are always a really sweet way to display mommy and baby sets