Bangalore has many places that families can enjoy together.
Lalbagh Botanical Garden is a good choice for a relaxed walk. Cubbon Park is also nice for families who enjoy nature and open spaces.
For children, the Visvesvaraya Industrial and Technological Museum can be an interesting visit. The museum has many science and technology exhibits. Bangalore Palace is a good option if your family enjoys history and architecture.
Families can also visit Bannerghatta Biological Park for its zoo, safari, and butterfly park. If you want a full day of fun and rides, Wonderla is another option.
I would suggest choosing two or three places based on your family’s interests. This will keep the day comfortable and give everyone enough time to enjoy each place.