Unusual Father's Day Gift Ideas?

I have to face it, Bleu Dad is not getting any younger and has nearly everything that he ever wanted, so what could I get him for Father's Day?

Don't say hookers and blow. Or tacoes.

In the past several years I have sent flowers, edible arrangements, a hand written letter, cookies, and some other really thoughtful things. This year nothing is rocketing to mind. I thought about making a donation to Michael J. Fox's foundation in Bleu Dad's name (Bleu Dad has Parkinson's). I'll certainly be spending the day with him and we'll have a remembrance of sorts because Bleu Mom passed away on Father's Day many years ago.

Ideas?

is he able to get around and do stuff? Perhaps some sort of experience together instead of an object?