Do Guinea Pigs need therapy?

We brought the guinea pigs home from school last weekend and had a lot of fun with them. Well, we did, I'm not so sure if the pigs enjoyed it. They come out of their cage on school days after the kids leave. They run and play and stretch. They would not even go near the opening of the cage to come out at our house. Perhaps it was the midget banging on their cage and screaming like a banshee that brought on their apprehension. Enjoy.