Don’t take my word on it. Take a little bit of your day to read this article in the Idealist Blog; Why So Serious? What Playful Thinking Can Do For You. Then decide how you’re going to finish the day; grumpy because you gotta do it again tomorrow or with a good game of Twister?
From personal experience, a game of Twister with a two year old and a six year old is a perfect remedy for a solid, good night’s slumber.