My favorite big birthday gift we did for my Dad’s 70th. He didn’t want a big party so we secretly sent out 70 pre-addressed stamped postcards in a letter to friends and family. The postcards had photos of him through the years on the front. We asked in the letter that people write a funny story, quote, memory, draw a picture, etc on the postcard and send them back in his birthday month. He loved it. Not only did he get a month of exciting mail, he made many phones calls to people as he got their cards.