Me (offering her cup of water): Do you want a drink?
K (shaking head politely): no!
I open the fridge and add three or four drops of grape juice to her full cup of water, turning the water a nice shade of purple. She watches closely.
Me: Now do you want a drink?
K (eager): uh-HUH! Pweeeeze?
She takes her cup and gulps it down all at once, coming up gasping for air.
I don't know what she'll do when she gets to taste full strength juice.