Life is too short to spend those days with the family in front of the TV. Don't get me wrong, any time spend together is a day well spent. But why not show your little ones the world around them. Let them touch it, smell it and learn to treat it with the respect it deserves. Get an allotment, dig a hole in the garden just because you can but don't tell the wife afterwards, litter pick your local park, set a random point on the satnav, drive to it and explore. As long as you do it together and as a family, it will make those 6 days at work more bearable until the next adventure comes along.