Watch Caillou: Adventures with Grandma and Grandpa (2022) HD Full Movie Free on SolarMovie. Watch Caillou: Adventures with Grandma and Grandpa (2022) online free. During a sleepover at his grandparents' seaside cottage, Caillou is excited to try swimming in the o...During a sleepover at his grandparents' seaside cottage, Caillou is excited to try swimming in the ocean but spends his time focused on the things they do differently than his Mommy and Daddy.