For my dad's birthday earlier this month, we had a modest celebration. Namely, mostly just cake and ice cream. The poor guy got one actual birthday card, and no presents that came wrapped (we got him a magazine subscription...which is hard to wrap). But, he is pretty easy to please. So a day with some family, followed by yummy cake made him happy.
We tried to teach Papillon about blowing out candles. Conveniently, if you tell her something is "hot" she will just start blowing at whatever is in front of her. If the singing hadn't overwhelmed her, I think she would have been a big help blowing out the candles.