It's nothing special, how I approach each birthday as a father. I just tell my kids (whether they ask me or not) I'd like to do something fun, and encourage them to throw their ideas at me; where to go, what to do, and where and what to eat. It's fun to hear what they say.
I smile at their enthusiasm and bite my tongue when they argue, and ultimately go along with whatever they decide - which is never what I silently hope for.
What the lone wolf in me wants is a huge home-cooked breakfast without having to cook or clean or listen to the kids go to battle over who gets which pancake when the first batch hits the table. He wants to take off on his own, cycling or hiking or both, at his own pace and discretion, with no debating where to stop for ice-cream. He'd get home just as the sun was dipping behind the mountains, and take a long hot shower and sit down to a burger and a beer without having to wash the dishes or listen to the kids argue over who gets to use the ketchup first.
Lone Wolf is going to have to try again next year.