In a manner of speaking, sir, it was the kite that ran away, not the children.
6 seconds sound clip from the Mary Poppins movie soundboard.
You can hear this line at 00:15:49 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, I wouldn't be too hard on 'em, sir. They've had a long, weary walk today.
- Children, come here at once.
- Well?
- I'm sorry we lost Katie Nanna, Father.
- And the kite was too strong for us.
- In a manner of speaking, sir, it was the kite that ran away, not the children.
- Thank you, Constable. I think I can manage this.
- Actually, it wasn't a very good kite.
- We made it ourselves. Perhaps if you helped us to make one...
[...]