Heard this on the radio... told many times, but probably my favorite joke.

One morning before daybreak, Little Johnny scatters out onto the front porch with a handful of duck tape. He's stopped by his grandfather, who rests comfortably on an old rocking chair... his usual morning leisure. The grandfather notices the duck tape...

 

"Whatcha doin' with that duck tape, boy?"
The boy answers, "Gonna catch me some ducks of course."

He skips along and the old man chuckles himself back into his chair... "That boy's a damn fool..." he mutters, "... a damn fool."

 

But low and behold, three hours later, the old man bites his words. The boy did return and under each arm were two, young ducklings. The old man is bewildered. "Welp, you proved me wrong son! Shame on me to doubt my own grandson."

 

Next day, just before sunrise, same thing happens again. Little Johnny runs out of the house with a bundle of chicken wire.

 

"What do you have this time? Chicken wire?" says the old man, "You gonna catch some chickens?"
 
"I'm gonna try!" says the boy. And he scurries along into the fields.

 

Times goes on and dusk approaches. The old man gets worried as Little Johnny hasn't returned in many hours. Suddenly, through the fallows, he sees a dozen chickens running towards the house, followed by a twelve year old boy with a handful of chickens. "That son of a bitch did it!" says the old man.

Well, on the last day... boy comes out of the house again with a brown paper bag filled with items unknown.

 

"Oh boy, what do you have there now!"
"Pussywillow!" says the boy.
The old man jolts up and shouts, "Hold on let me get my hat I'm coming with ya'!"