Cosmonova

Cosmonova is an IMAX theater part of the Swedish Museum of Natural History (Naturhistoriska Riksmuseet). On 760 square metres dome-​shaped screen, which makes you feel you are in the middle of the movie (especially if it is a 3D movie) they usually show about 40 – 50 minutes long nature/​science related movies. Excellent for kids (age limit is 5 years, but check available movies just to be sure) both in terms of length and content.
Tickets may be reserved and/​or bought online, or at the theatre. Good thing to know is that the tickets are not numbered so in order to get the best spots make sure to line up in the queue 10 minutes before the movie starts. Tickets are 100 kronor for adults (50 kronor for 5 – 18 years old). If you plan to visit museum as well, get at combi-​package to get half the entrance fee. There are also student discounts.
To be kid friendly most movies have Swedish narration (no subtitles), however, there are free receivers to borrow so you can get the English narration. Make sure to bring your own earphones (standard 3.5mm plug) or buy some for 15 kronor.