Barney Rubble was dressing up as a magician called the Great Rockini. "Heh-heh, watch me trick Fred out of his Cocoa Pebbles," he said to the viewers as he put a fake moustache under his nose.
Then with a magic wand, he said, "Alakazam!" And POOF! He magically transported himself to Fred Flintsone's dining room where Fred was at the table eating his Cocoa Pebbles.
POOF again! Barney appeared right in front of Fred. "The Great Rockini," said Fred, "the world's famous magician!"
"I'd like for you to do some magic tricks with me," said Barney, "but first, I want something super chocolatey you got here."
"It's a pleasure to do magic tricks with you," said Fred. "Have some Cocoa Pebbles." He gave his bowl of cereal to Barney.
Barney took a spoonful of Cocoa Pebbles and said, "Mmm! Magical chocolatey taste!" A big brown word, "chocolatey", was shining over his head.
Fred grabbed Barney's wand. "Now how does this work?" he wondered. He waved the wand and said, "Hocus pocus!" POOF! He accidentally made Barney's magic hat and fake moustache disappear!
Barney's cover was blown, and Fred wasn't fooled for long. "Barney, my Pebbles!" he shouted angrily as Barney put a sheepish grin on his face.
"Heh-heh, they're magically delicious," Barney said and ran out of the dining room. Fred chased after him.
A stone table was seen with a Cocoa Pebbles cereal box, a bowl full of Cocoa Pebbles, a spoon, grapes, orange slices, a saucer of buttered toast, and a glass of milk on it. Fred's voiceover said, "Post Cocoa Pebbles cereal, part of this complete breakfast."