running in the house

As the mother of a two and four year-old, generally when the phrase "...running in the house" escapes from my lips it is preceded by the word "No." Today, however, on day eight of Christmas vacation, I decided that running in the house isn't the worst thing your kids can do. We don't have any neighbors below us, for one thing, and they were laughing while (unknowingly) wearing themselves out the whole time. Just look at their faces and tell me you don't wish you could do the same thing: