Kikoriki: Team Invincible (2011) on Netflix

Plot summary

In Chamomile Valley, Krash and Chiko search for a place to bury a time capsule and come upon a cave holding a dinosaur skeleton and an old television set. The cave collapses, so they carry the set home, where Dokko repairs it. The friends watch a program about the superhero Lucien, who battles Dr. Caligari, a villain set on taking over the world. Taking the broadcast for real, Carlin and Krash propose traveling to the city to lend Lucien a hand. The group builds a raft and sails away, leaving Wally behind to mind the lighthouse. Wally changes his mind and swims after them on a log, and a passing cruise ship sends a wave that washes their television overboard.