Here's another in-universe show for the Sprout universe - you might've heard of it in a YouTube community post about other in-universe shows or in the story "Nicholas on TV" (https://www.artstation.com/artwork/gRy4ge). Indy is a show about the titular bug-like girl who and her robot sidekick Wco go on adventures to places like outer space or the zoo while overcoming obstacles and teaching numbers, shapes, colors etc with the viewers' help.
Here's a typical episode: The show starts with the theme song, then Indy and Wco greet the viewers on their home-planet of Uranus, asking if they're ready to play like they are. Just then, they receive a message from Agent Asteroid, who tells them where they need to go and why. Indy asks the viewers if they want to come. Then, Indy and Wco set off on their rocket ship and overcome obstacles that involve counting, shape recognition, object and/or animal identification, etc, encouraging the viewers to help them out. Afterwards, they finally arrive at their destination, doing what they came here for, sing the Goodbye Song, and then the episode's over. In the fourth and final season, a segment where Wco talks to kids was added after he and Indy land on Earth.
It's no wonder why this show was such a success, running for four seasons from 2003 to 2008.