When it is alive we sing, when it is dead we clap our hands. What is it?

Why this works

This riddle plays with the dual meanings of "alive" and "dead" in relation to birthday candles. When the candles are lit (or "alive"), they are often surrounded by singing as people celebrate a birthday. Once the candles are blown out (or "dead"), it’s common for people to clap their hands in celebration of the moment. The clever juxtaposition of life and death in this context makes the riddle both playful and relatable!