-Stay and plays at children centres -The London museum docklands does a session called "tots at the docks" once a month that's free -Mudlarks family gallery at the London museum docklands 3£ 45min sessions -Check out soft plays in your area as many of them are only 3-7£ per child
@Sophie great. Thank you!
London Transport museum is 20£ for the whole year and kids free
Children's centres