Part of Fred Rogers's routine on Mister Rogers' Neighborhood was feeding his fish. After recieving a letter from a blind little girl, he was careful to verbally tell viewers when he fed them:
Dear Mister Rogers,
Please say when you are feeding your fish, because I worry about them. I can't see if you are feeding them, so please say you are feeding them out loud.
Katie, age 5
Katie's father noted that she really does cry. Mister Rogers included Katie's letter in an anthology of letters that he received from children. In it, he reflected:
Since hearing from Katie, I’ve tried to remember to mention out loud those times that I’m feeding the fish. Over the years, I’ve learned so much from children and their families. I like to think that we’ve all grown together.