Who's clapping?
The aunt is clapping.
Who's playing the guitar?
The wife is playing the guitar.
Who's playing the violin?
The daughter is playing the violin.
Who's playing the trumpet?
The granddaughters are playing the trumpet.
Who's playing the piano?
The husband is playing the piano.
Who's playing the drums?
The grandson is playing the drums.
Who's dancing?
Little Charlie is dancing.
Who's playing the flute?
The son is playing the flute.