Drip, drip, drip. Rain was coming through the roof of the chook shed.

"The hens are getting wet!" said Suzy.

Little Thunder looked at the pile of things by the shed. "Let's find the best material to fix it."

Spike picked up a towel. "This is soft." He held it under the drip. The towel soaked up the water. "Absorbent! Good for drying, but not for a roof."

Little Thunder tried a piece of cardboard. It went soggy and floppy. "Not waterproof," he said.

Suzy found a metal sheet. "This is stiff, and water runs right off it." They tested it with the hose. Whoosh! The water slid off.

"Waterproof!" cheered the friends.

They fixed the metal sheet over the hole. Then Spike had another idea. He put a clear plastic panel in the wall. "It's see-through, so the hens get sunshine."

The hens clucked happily. They were dry and warm.

"Every material has a job," said Suzy. "You just have to test it!"