If you're looking for anime similar to Flying House, you might like these titles. All recommendations are made by Anime-Planet users like you!
Chris and Joy were two normal children living normal lives - until one day they discovered a magical bible called the Superbook. When everyday events touch upon a holy story, the Superbook glows, opens, and transports the children and their toy robot back into time to experience an event for themselves. Whether it's witnessing the creation of Noah's Ark, discovering the origin of Mother's Day, or coming face to face with David and Goliath, there are plenty of stories the children will experience together.
It's flat out impossible to recommend a better pair of anime for each other, given that they are sister series of sorts. Both Flying House and Superbook are filled with Christianity galore and follow a group of children + robot in their adventures through stories of the Bible.
While playing a video game one day, Tomoru, Dai and Mio found themselves accidentally transported inside yet another game: Eureka, designed by the studious Dr Galileo! In order to return to the real world, the gang must earn ten Eureka stones by completing various scientific challenges - but they have competition. Fellow rivals Yukio, Suzuka, and Kouta, along with Dr Galileo's rival Dr Galilei, are also trying to find the stones. From collecting fossils to stopping lightning in the sky, thrilling scientific challenges await!
First off, Flying House is 100% aimed at Bible stories, and Sounanda is not. Regardless, I think if you enjoyed the non-religious elements of Flying House, you'd enjoy Sounanda too. Children are pulled into a strange new world or story in each anime, and they in general have a similar feel. Perhaps you could think of Sounanda as being Flying House's alter-ego; while Flying House is focused on religion, Sounanda is focused on science.