Dora, the brave explorer with her bright pink shirt and backpack, laughs as she stacks blocks with Blue, the energetic blue puppy with floppy ears and a wagging tail. Diego, the animal rescuer in his orange shirt, joins them, tossing a ball lightly. The room hums with innocent joy under the golden light. "This tower is going to be the tallest ever! Let's see if it can reach the stars, amigos!" "Woof! Woof! I'm helping build it super high, Dora! What do you think, Diego? Can we make it even bigger with more blocks?"

The friends freeze mid-game when a translucent white figure emerges from the fog, its hollow eyes glowing faintly green, tattered sheets billowing like spectral wings, floorboards creaking ominously under invisible weight. Toys rattle on their own, casting long flickering shadows from the fading light. Panic flashes across their wide eyes. "¡Mira! What's that? It looks like a ghost! It's coming right towards us with those scary glowing eyes and floating sheets!" "Ay, no! A ghost in our playroom? Run, everyone! We have to get out before it catches us!"

Blue leads the sprint, paws pattering frantically, while Dora and Diego stumble behind, glancing back at the pursuing misty form that wails softly. They burst into the outdoor courtyard, dewy grass slick underfoot, fireflies blinking like tiny warnings. Breathless and huddled under a starry canopy, they catch their breath. "That ghost was so scary! It chased us all the way out here with its spooky moans and floating arms. What if it finds us again? We need help fast!" "Sí, it had chains rattling too! We can't go back alone. Who can fix this ghostly problem before it haunts the whole Nick Jr. world?"

Panting from their run, Dora, Blue, and Diego activate the portal, their voices urgent as they dial Geo, the math whiz with his orange shirt and UmiAlarm tool belt, and Milli, his pattern-loving sister with pink hair ribbons. Bot, the robot friend with shiny blue body and spinning top head, appears on screen too. Desperation mixes with hope in the vibrant glow. "Geo, Milli, Bot! A ghost scared us in the playroom—it floated with glowing eyes and chased us out! It made toys move and the air super cold. Please come help us figure out what's going on!" "Don't worry, friends! We're on our way with our UmiMight. Tell us every detail about the ghost's shape, color, and how it moved so we can use math patterns to solve this mystery together."

Geo scans with his shape-finder, Milli measures patterns on the floor, and Bot projects light beams to reveal hidden clues, while the Nick Jr. friends watch tensely. A faint mechanical whir echoes from the toy chest, tension building as numbers and shapes align in the air. Suspense thickens the misty air. "Look at these repeating shadow patterns—they form a square, then a circle, not random like a real ghost. And the fog has tiny sparkles that match party confetti math!" "Affirmative! My sensors detect no supernatural energy, just a projector and fan making the spooky effects. Let's count the clues: one fog machine, two sheet props, three glowing lights—it's adding up!"

Kai-Lan[/@ch_7], the friendly girl from Ni Hao Kai-Lan with her red dress and mischievous grin, surrounded by prank gadgets like a fog machine, projector, and white sheet costume.] Laughter erupts as the "ghost" is unmasked, the fog dissipating into harmless mist, toys settling quietly, the room warming with relief under starry night skies visible through windows. Hugs and high-fives follow, turning fear into friendship. The prankster sheepishly explains her Halloween surprise gone too far. "It was just me trying to make a super fun Halloween ghost surprise for everyone! I used the fog machine for mist, projector for eyes, and sheet for floating, but I didn't mean to scare you so much. Sorry, friends—let's all celebrate with no more scares!" "Problem solved with UmiMath! It wasn't a ghost, just a clever prank. Now we can all play together without any more frights—who's ready for a pattern game to celebrate?"