We went to a dinosaur movie with our daughter. The immersion in the picture is maximum, the plot is very interesting. In the planetarium, films are mainly in Greek and English, but there is a headset with an adapted language (including films with Russian, but not all, you need to clarify).
I would put 3 on the planetarium itself and recommend that you do the arrangement. The planetarium is located in a remote location, has a large area, while inside there is only a cafe, a vr room and a gift shop. I wish there were more activities inside, for example, a museum about space or something like that. Then the trip would be more reasonable and interesting for children