Feeling Left Out

I know I have two really great kids. They play well together and both of them can play individually, too. However, yesterday I kept trying to participate with them and they didn't need me. Sometimes I feel left out because their brains are carrying on conversations with each other and there's no room for me. I know I should just be grateful, but I also want to be a part of their play. All too soon this will be over (school starts soon) and then I'll miss the ability to accomplish everything and more because it'll just be Gianna and me at home.