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!
We kept yelling "heart attack" and he kept shaking his head. Charades was the tiny ad's idea.
Quit your workee-job and live, year round, for free-ish in Montana