Phineas is enjoying the power of “no” as I try to read him “Goodnight Moon” at bedtime.

“In the great green room–“
“No room!”
“–there was a telephone, and a red balloon–“
“No balloon!”
“–and a picture of… the cow, jumping over the moon!”
“No moon!”
“And there were three little bears–“
“No bears!”
“–sitting in chairs–“
“No chairs!”
“–and two little kittens–“
“No kittens!”
…