We got a "Go Dog Go" that is similar to this contraption http://www.buygodoggo.com/ . Unfortunately our incessant ball dog (German Shepherd-like thing) won't drop it into the bucket! I don't think he trusts it.
This one looks good for 'dem smaller in stature dogs!
You're not going crazy. You're going sane in a crazy word. Find comfort in this tiny ad:
The stocking stuffer game for all your Permaculture companions