Happy Birthday, Dad.
I hope you got everything you want and nothing you need.
I left a piece of cake for you in the fridge. I know you don't want it now but I know you'll be back to eat it later.
I'll leave a candle burning on the cake, and not the trick kind. Those are for amateurs.
Michigan won and Notre Dame lost.
Dinner's up to you tonight. Whatever you want to do, wherever you want to go.
I wanted to buy a card but I didn't know where I should send it, so instead I quietly told a joke to myself about dads and duct tape. After that I did an impression of you looking at me (also played by me) incredulously, wondering why you always get cards like that.
I tried to sing "Happy Birthday" but couldn't get through it, so the thought will have to count.
I have more thoughts but can't get through them either, so these will have to count for now.