Cairo, a bright-eyed 6-year-old, peeked into the nursery where his baby sister, Riley, lay in her crib. He tiptoed closer, his face lighting up with excitement as he whispered to her. "I've got big plans for us, Riley. We're going to have so much fun together!"

Cairo sat cross-legged on his bed, his mind buzzing with ideas. He imagined uploading funny videos on YouTube, where they would become stars. "I'll teach you how to make people laugh, Riley," he said, glancing at his sister's photo on the nightstand. "We can be the best brother-sister duo ever!"

Cairo bounced down the stairs, eager to explore every corner of their new home. "Come on, Mom! Let's find all the cool spots for our games and videos," he urged, pulling his mother's hand as they ventured into the backyard.

Cairo climbed up to the treehouse, imagining it as their secret studio. "This is where we'll record our best scenes, Riley," he envisioned, picturing his sister giggling beside him. "We'll make videos that teach kids how to read and do math in the most fun way!"

Cairo entered his new school, excited yet a little nervous. He imagined the friends he would meet and the stories he would tell them about his adventures with Riley. "I'll tell them how amazing my sister is and all the cool things we'll do," he thought confidently.

Cairo sat beside Riley's crib, gently holding her tiny hand. "I promise, Riley, I'll help you do anything you want," he whispered with determination. "Together, we'll explore the world and make it amazing."