head. They stood there next to each other in silence, watching the other kids play, until Lisa asked, âWas that really true, what you said about Doctor Proctor and the invention?â
âOf course,â Nilly said with a wry smile. âAlmost everything I say is true.â
Right then the bell rang.
Nilly Has an Idea
THAT AFTERNOON, NILLY knocked hard on the cellar door at the blue house. Three firm knocks. That was the signal theyâd agreed on.
Doctor Proctor flung open the door and when he saw Nilly, he exclaimed, âWonderful!â Then he raised one bushy eyebrow and lowered another bushyeyebrow, pointed, and asked, âWho is that?â
âLisa,â Nilly said.
âI can see that,â the professor said. âShe lives across the street there if Iâm not mistaken. What I mean is: Whatâs she doing here? Didnât we agree that this project was top secret?â
âObviously itâs not that secret,â Lisa said. âNilly told the whole class about it today.â
âWhat?â the professor exclaimed, frightened. âNilly, is that true?â
âUh,â Nilly said. âA little, maybe.â
âYou told ⦠you told ⦠,â the professor sputtered, waving his arms around in the air, while Nilly stuck out his lower lip and made his eyes look big, as if he were on the verge of tears. This facial expression, which Nilly had practiced especially for situations like this, made him look like a tiny little, very depressed camel. Because everyone knows that itâs absolutely impossible to be mad at a verydepressed camel. The professor groaned, giving up, and lowered his arms again. âWell, well, maybe itâs not so terrible. And you are my assistant after all, so I suppose itâs all right.â
âThanks,â Nilly said quietly.
âSure, sure,â said the professor, waving his hands at Nilly. âYou can stop trying to look like a camel now. Come in and close the door behind you.â
They did as he said, while Doctor Proctor hurried over to the test tubes and glass containers that were bubbling and smoking with something that smelled like cooked pears.
Lisa stopped just inside the door and looked around. There was a potted plant with white petals on the windowsill. And on the wall next to it hung a picture of a motorcycle with a sidecar infront of what she assumed must be the Eiffel Tower in Paris. A smiling young man who looked like the professor was sitting on the motorcycle seat, and there was a sweet, smiling girl with dark hair in the sidecar.
âWhat are you doing?â Nilly asked Doctor Proctor.
âIâm perfecting the product,â he said, stirring some mixture in a big barrel. âSomething that ought to give it even more pep. A concoction of the more explosive type, you might say.â
The professor dipped a finger in and then brought it to his mouth. âHmm. A little more wormwood.â
âCan I taste?â Lisa asked, peering over the edge of the barrel.
âSorry,â the professor said.
âSorry,â Nilly said.
âWhy not?â Lisa asked.
âAre you a certified fart powder tester, perhaps?â Nilly asked.
Lisa thought for a second and said, âNot as far as I know.â
âThen I recommend that you leave the testing to me for the time being,â Nilly said, pulling on his suspenders. Then he took a spoon and stuck it down into the barrel.
âCareful,â the professor said. âStart with a quarter spoonful.â
âSure,â Nilly said, putting a quarter spoonful of powder in his mouth.
âThen weâll start the countdown,â Doctor Proctor said, and looked at the clock. âSevenâsixâfiveâfourâthree ⦠hey, donât stand right behind him, Lisa!â
Right then there was a bang. And Lisa felt a blast of air hitting her before she lost her balance and sat down hard on her