We got a laser pen for Wes for Christmas and it was the strangest reaction. He pawed at the red dot for about a minute and then looked up at the pen and growled and pawed at it! It was like he discovered the trick and was kinda PO'd that we were messing with him!
Doodles are smart little buggers!
Have fun with it. With my parents' dog, we shine it on the wall and he stands on his back legs and paws at it. It's hysterical.