I am organizing a "Surprise Over The Hill Mystery Bus Tour" for my father's 50th in July.   I have organized a surprise dinner with the family and a surprise guest (one of his closest friend's who he hasn't seen for years)at the start of the evening.   And after dinner, the Mystery Bus will arrive with all of his mates from where he has worked, school mates and old friends. The bus will be decorated with blown up photocopies of dad as a boy and now, and a few embarrassing pictures. I have organized balloons that have a photo of dad scanned on them and have created on A3 card "50 reasons you know your getting old", printed off quotes about old age, and lots of humor about aging.  The bus will be touring all of his old local haunts! And I am hoping it will be a great chance for him to reminisce on his past.