Have you seen Where's Mo book? Like Where's Wally, but with Mo Farah and his sporting friends including Jessica Ennis, Tom Daley, Zara Phillips and Bradley Wiggins. We (10-, 8- and 3-year old and I) spent a good hour looking for Mo, his friends and other objects on each page. Even three-year-old got really into it and there were no fights!
It's not often we find something that keeps them all entertained for a while. Brought back good memories of Olympics and will be good for rereading over Xmas as family.