Kids!

A grandfather is driving his 9 year old granddaughter to school one day and beeped the horn by mistake.
She turned and looked at him for an explanation.
He said, "Ooops, I did that by accident."
She replied, "I know that, Granddad."
He replied, "How did you know?"
She said,
She turned and looked at him for an explanation.
He said, "Ooops, I did that by accident."
She replied, "I know that, Granddad."
He replied, "How did you know?"
She said,
Spoiler: