The Regional Science Centre and Planetarium is Kozhikode's most useful family-friendly museum stop, with interactive science exhibits, a planetarium, and a small science park. It is not a grand museum, but it gives children and curious adults something active to do away from the beach and bazaar.
The planetarium is the main draw, so check show times before crossing town. Pair it with nearby central Kozhikode sights rather than treating it as a full-day attraction.