I draped a sheet over part of the ex-pen and they had a ball playing with it...

The pups on either side were pushing and nipping through the sheet... simple games, but they love it!

Oh yeah - how fast they learn the "rub my tummy pose..." lol

Sure helps me to have others patiently stop the pups from nipping feet as well...

Thanks Catherine - for lending me your yard and for being so patient with the pups...