Payment Made

"Oh, no!" moaned Megan. "I won't be able to mail this birthday card to Grandma until Monday."

"Why not?" asked Megan's little sister, Charis. "The mailman hasn't come yet. I'll go put it in the mailbox for you."

Megan shook her head. "We're out of stamps," she said. "Without a stamp on the envelope, this won't go anywhere."

Charis looked thoughtful for a moment and then bounded off to her bedroom. She soon returned with her hands behind her back and a grin on her face.

"What are you hiding?" asked Megan.

Charis beamed with pride as she held out a roll of dinosaur stickers. "You can use one of my stamps to mail your letter," she said.

Megan smiled at her sister. "That's very nice of you, Charis, but I'm afraid your stickers won't work," said Megan. "A letter has to have a postage stamp on it. Your stickers are nice, but letters have to have the real thing."

Charis frowned, and Megan tried to explain. "Postage stamps are a special kind of sticker. You buy them at the post office,