Read All About It! (1979)

When three kids explore a coach house held by a missing uncle, they discover far more than they bargained for when two robots, Otto and Theta, appear to tell them about a conspiracy against the town. By accident, they also discover a teleport machine that can take them to the planet Trialveron controlled by the alien tyrant, Duneedon. Against this threat, the kids decide to use the coach-house as the base for a community newspaper both to keep the building and to investigate the conspiracy. Along the way, they learn about writing and its various practical uses as they fight the alien forces that oppose them.