I was wondering about this 80’s movie I saw. It had some puppetry and a device like a cylindrical keyboard that would make sounds to open doorways or portals to other dimensions. A crazy queen wants to get her hands on it so she can bring a conquering arm into this world. There is a group of kids that save the world. Pretty standard sci fi fantasy plot….Does anyone know this?
Masters of the Universe (1987) – http://www.imdb.com/title/tt0093507/