Some of our favourites for free are the local libraries - we rotate them so we get a sense of fresh books/movies/toys each week. They also run free groups throughout the year. Also recently attended a local EarlyON group (0-6) and was blown away by the amount of activities and stations they had set up!
Outside is always good (and free). Local beach, sand play, sensory bins! Pinterest ideas for your kids age groups! Good luck ❤️