playing dough

We played dough today.
The kids like it so much,
And we got dirty hands.
The time to wash our hands. He 'cincai' washed and went away, and rushed for the slide.
I saw his hands, the dough still stuck in his fingernails!!
"Come, wash your hand thoroughly clean, then you may continue to play."
He still refused to.
"You know what... If your nail still stuck with dirty stuff, bacterias will bite your hand, your hands may get hurt and pain..."
"Ooo... bacterias bite."
After listened to my exaggerated explanation, finally he followed me to the washroom.