An evening of absurdist domesticity is explored in The Children, which is as humorous as it is sobering. While the semi-apocalyptic setting strays from the ordinary, the tale which unfolds in the homely kitchen of Hazel and Robin is at its heart a touching look at the intricacies of being human. Lucy Kirkwood’s play, on stage at Nottingham Playhouse until April 6, turns the audience into a veritable fly on the wall as three friends around a simple wooden kitchen table explore ideas of duty, family and getting old. What at first glance appears to be a quaint cottage and an idyllic retirement is…