The Blacks didn't believe in birthdays. They'd always thought a celebration of something as insignificant as a child was, well, unnecessary.
So it was with surprise that Regulus awoke on the morning of his seventh birthday to find a small chocolate fairy cake sitting on his pillow with a candle flickering merrily on top. There was a folded piece of parchment, too, and Regulus poked his finger at the sticky icing before reading.
Reg,
Happy birthday! Don't forget to make a wish!
Love from Sirius and Kreacher
He grinned, closed his eyes, and blew out the candle. Happy birthday indeed.