Crumbs.

Dad:" Girls, would you like some buns?" Now Fern, be very careful not to drop crumbs all over the floor."

Fern:" Ok, Ok Dad. I promise."

5 mins later.

Dad:" Fern, have you been a good girl and not dropped crumbs all over the place?"

Fern:" Yes Dad, I have been a very good girl and I have eaten my bun over the plate so I did not spill crumbs all over the place."

This is what it turns out like when me and Dad look.