Harry, the color-changing hippo, stood at the entrance, his skin swirling with hues of pink and blue. He was excited yet nervous about his first day. "I hope they like me," he whispered to himself, taking a deep breath before stepping inside.

As Harry walked through the corridors, he spotted a cheerful parrot named Perry fluttering above. "Hello there! You must be new. I'm Perry," chirped Perry, his feathers a riot of colors. "Hi, I'm Harry," replied Harry, his colors shifting to match Perry's vibrant plumage.

Benny, a shy turtle with a shell resembling a patchwork quilt, sat quietly at a table. "Come join us, Benny," called Perry as Harry settled beside him. "I love painting," Benny said softly, a shy smile spreading across his face. Together, they dipped their brushes into the paints, creating a masterpiece on the canvas, with Harry's colors dazzling everyone.

Harry, Perry, and Benny decided to explore the playground in search of the legendary hidden colors. "I heard there's a rainbow slide that changes colors when you slide down it," Harry exclaimed, his skin a twinkling spectrum of excitement.

Perry flapped his wings with enthusiasm. "Let's try it!" he urged. One by one, they slid down, each experiencing a burst of colors as the slide shimmered in hues that mirrored their joy. "This is amazing!" Benny laughed, his voice echoing with newfound confidence.

"Today was the best first day ever," Harry said, his colors settling into a warm, content glow. "We're glad you're here," Perry and Benny chimed in unison. And as they watched the stars begin to twinkle above, they knew this was just the beginning of their colorful adventures together.