Birthday Present
I have two kids one 32 and one that is 11. Ask your dad where his favorite place to eat and tell him you will take him and pickup the tab. Do not forget the tip. Also write him a hand written letter thanking him for all that he has done for you. He will think a lot more of the letter if written from your heart than anything you could buy him. Give him a big hug after the meal and tell him that you Love Him and glad you have him for a dad.