VIDA! Science Centre is Brno's main hands-on science museum, built around experiments, interactive displays, and demonstrations rather than quiet cases. It is especially strong for families, but the best exhibits have enough movement and explanation to keep adults engaged too.
The centre sits near the exhibition grounds, so it pairs well with other sights west of the old town. It is a practical bad-weather option and a good reminder that Brno is not only castles, churches, and cafes; it is also a university and research city with a playful side.