I know a girl called Ruby
Whose little sister is quite groovy
Her name is Eva and she shouts and screams!
Makes us want to disappear!
Ruby always winds her up till she screams
Then gets told off
But Eva has a secret weapon
When she sees Rubys least expecting
There comes a pong without a sound
A trouser cough? A silent pop?
Oh my god she's done a boff!
Run for cover she's let one off
Or was it mummy?
Oh blame the dog!