Johann mentioned a site where you can buy interesting products, so I went to have a look. I liked the hemp collars for dogs. I try to wear natural fabrics myself, as I can sometimes be allergic to synthetics, so I think hemp might also be better than nylon for Penny.
A gadget that grabbed my attention is a ball-thrower that folds down to fit in your pocket or the glove-box of the car. All too often I can't be bothered walking along the street to the park swinging the great big ball-thrower. I'd love to have a small one like this. It seems pretty expensive, compared to the simple ones you can get for $2, and which work perfectly well - but who knows, maybe for the dog who has everything...
And who wouldn't want a gadget that shoots disco-treats up to twelve feet away? I can just imagine the fun as Penny leaps around the garden or the park looking for them. Hmmm... maybe a bit tricky to find the treats?
The Chase-It looks fun. I've seen my friends' cats playing with those little toys that dance around on an elastic string but never would have thought of one for dogs. It's described as an ergonomic handle molded onto a 48" or 40" nylon braided rod with a 48" nylon rope. Attached is an thick plush squirrel with two squeakers and a bungee body. I'll have to make sure that Rusty hears about it, seeing his main hobby is chasing squirrels. He could get in some practice while the squirrels have a rest. They also advertise it as a lure for agility - I'm not experienced enough to know whether that would work or whether it would be allowable.
Anyway, I had fun browsing their site.