When my guys were pups I would get on the floor on all fours and pretend to be a dog. Waggle my butt, take my hand(paw) and tap the dog on the head, scoot around on the floor etc.. My guys loved it. They must have though I was crazy, but the ran around and over and under me. I would sometime incorporate a toy and we would "share". Do watch out if your guy is a nipper and discourage that. If my boy would nip or get mouthy I used "ouch" command loudly and stop play.
