This awesome scene from Sudbury Valley School is right out of Phineas and Ferb.
[Mom] “Did you bring your money to school?”
[7-year old] “Yes.”
“What for?”
“To order pizza for the party.”
“Where’d you get the pizza?”
“From Gianni’s.”
“How did you order it?”
“I called them and ordered it.”
“Whose phone did you use?”
“I went to the office and Jean let me use her phone.”
“How much was it?”
“About $13.”
“Did you give the driver a tip?”
“Yes, $5.”