We've lived in our home on a 1/3rd acre for almost 8 years now. Unfortunately the man who built the house LOVED concrete. Our driveway runs up, beside the house and then half of our backyard is a parking lot that we don't use. It's been handy for our daughter to learn to ride her bike, but really now, it's just wasted space. We are south facing, with forest on 3 sides, so there isn't a huge amount of sun. So, I'm looking for something ingenious to do with this wasted space. We can't afford to pull up the concrete unfortunately. Any ideas?