Goosebumps - The Scarecrow Walks At Midnight

Jodie loves visiting her grandparents' farm. Okay, so it's not the most exciting place in the world. Still, Grandpa tells great scary stories. And Grandma's chocolate chip cookies are the best.
But this summer the farm has really changed. The cornfields are sparse. Grandma and Grandpa seem worn out. And the single scarecrow has been replaced by twelve evil-looking ones.
Then one night Jodie sees something really odd. The scarecrows seem to be moving. Twitching on their stakes. Coming alive . . .