blue.â
âWhatâs that mean?â said Annie.
âIâm not sure,â said Jack. He looked around the tree house. âBut I bet that book will take us there.â
He picked up a book in the corner. The cover was a picture of a wide prairie. The title was
The Great Plains
.
âReady?â Jack said.
Teddy yipped and wagged his tail.
âLetâs go,â said Annie. âThe sooner we free Teddy, the better.â
Jack pointed at the cover.
âI wish we could go there,â he said.
The wind started to blow.
The tree house started to spin.
It spun faster and faster.
Then everything was still.
Absolutely still.
Early sunlight slanted into the tree house. The cool breeze smelled of wild grass.
âOh, man,â said Jack. âThese are neat clothes.â
Their jeans and T-shirts had magically changed. Jack had on a buckskin shirt and pants. Annie wore a fringed buckskin dress.
They both wore soft leather boots and coonskin caps. Jackâs backpack was now a leather bag.
âI feel like a mountain man,â he said.
âAll youâre missing is a mountain,â said Annie. She pointed out the window.
Jack and Teddy looked out.
The tree house sat in a lone tree in a vast golden prairie. The sun was rising in the distance.
Wind whispered through the tall yellow grass.
Shhâshhâshh
, it said.
âWe need a gift from the prairie blue,â said Jack.
âI bet that means the sky,â said Annie, looking up.
âYep,â said Jack. The sky was growing bluer as they watched. âBut how are we supposed to get it?â
âJust like last time,â said Annie. âWe have to wait till someone gives it to us.â
âI donât see any sign of people out there,â said Jack.
He opened their book and read aloud.
The Great Plains are in the middle of the United States. Before the 20th century, this vast prairie covered nearly a fifth of Americaâs land. Some called it âan ocean of grass.â
Jack pulled out his notebook.
âCome on,â said Annie.
She picked up Teddy and carried him down the ladder.
Jack quickly wrote:
âWow, this
is
like an ocean of grass,â Annie called from below.
Jack slipped the Great Plains book and his notebook into his leather bag and climbed down.
When he stepped onto the ground, the grass came all the way up to his chest. It tickled his nose.
â
Ah-ah-CHOO!
â he sneezed.
âLetâs go swimming in the grass ocean,â said Annie.
She started off with Teddy under her arm.
The wind blew gently as Jack hurried after her. All he could see was rolling waves of grass.
They walked and walked and walked. Finally, they stopped to rest.
âWe could walk for months and never see anything but grass,â said Jack.
Arf! Arf!
âTeddy says thereâs something great up ahead,â said Annie.
âYou canât tell what heâs saying,â said Jack. âHeâs just barking.â
âI
can
tell,â said Annie. âTrust me.â
âWe canât walk all day,â said Jack.
âCome on,â said Annie. âJust a little farther.â She started walking again.
âOh, brother,â said Jack.
But he kept going through the tall, rippling grass. They went down a small slope, then up a small rise. At the top of the rise, Jack froze.
âWow, that
is
great,â he whispered.
âTold you,â said Annie.
Jack stared at a circle of tepees ahead. Busy people in buckskins moved about the circle. Horses and ponies grazed nearby.
Jack took out their research book and found a picture of the tepees.
He read:
In the early 1800s, many different Native American tribes lived on the Great Plains. The Lakota were the largest tribe. They lived mostly in the areas we now call North Dakota, South Dakota, and Minnesota.
Jack pulled out his notebook and wrote:
Behind Jack and Annie, a horse neighed.
They