Upside-Down Sidewalk

I slipped under the front gate for some morning air and spotted a glass marble resting in the dirt along the sidewalk! I ran over, expecting to kick it like a soccer ball, but the bright red swirl trapped inside made me stop. I hoisted the heavy sphere up to my bill and peeked straight through the glass. My eyes went wide—the whole neighborhood flipped completely upside down! The blue sky was on the ground, and the tall wooden fence posts were dangling from the clouds like icicles. I rolled the glass around between my flippers, laughing at how crazy the sidewalk looked standing on its head. A brand-new pocket telescope, claimed!