London with Kids: The Free Museums Do the Heavy Lifting

London is expensive, with one enormous exception: the national museums are free to enter, and several of them are among the best places in Europe to spend a rainy morning with a child. That single fact reshapes a family day here. The money goes on transport, lunch and one paid thing — not on admission after admission.

This plan stays in one corner of the city, South Kensington and the park beside it, because London is large and a day spent crossing it is a day spent underground.

Key facts

• Best for: ages 3 to 14
• Time needed: one full day
• Getting around: contactless card or phone tapped in and out; under-11s travel free on the Tube and buses with a paying adult
• What it costs: the two museums below are free; donations are invited

10:00 — The Natural History Museum

Go at opening. The building alone does half the work — a cathedral of a place in terracotta and blue brick — and the dinosaur gallery is what most children have come to London for.

The museum splits into colour-coded zones. With limited time and small children, the Blue Zone (dinosaurs, mammals, the blue whale skeleton in the main hall) and the Red Zone (earthquakes, volcanoes, an escalator that rises through a model of the Earth) are the two that land. The Darwin Centre's cocoon holds the specimen collections and is quieter when the front of the building is heaving.

Entry is free. Timed entry has been used at busy periods, so check before you travel and book a slot if one is offered — it costs nothing and skips the door queue.

12:00 — The Science Museum, next door

Literally next door, and also free. The ground floor has the big engineering objects — engines, rockets, a genuine Apollo command module — and the upper floors run through flight and space.

The paid exception is worth knowing about: Wonderlab is a hands-on gallery of experiments, slides and demonstrations aimed squarely at primary-school children, and it is ticketed separately. If you have one child under about eleven and one paid thing in the budget, this is a strong candidate for it.

13:30 — Lunch, and then out into the park

Museum cafés in South Kensington are adequate and busy. The better move on a dry day is to buy sandwiches and walk five minutes north into Kensington Gardens.

14:30 — The Diana Memorial Playground

In the north-west corner of Kensington Gardens, this is one of the best free playgrounds in Europe and the reason many London families come to this park at all. It is built around a large wooden pirate ship in a sandpit, with a teepee area, water play and climbing structures, all fenced with a single supervised entrance.

Access is limited to adults accompanying children, which keeps it calm. In school holidays there can be a queue to get in; earlier is better.

If the children are older, walk south through the park to the Serpentine instead and hire a pedalo on the lake.

16:30 — The river, if there is energy left

The Thames Clipper river buses are ordinary public transport that happens to be a boat, and they are covered by the same contactless payment as the Tube. Riding from Westminster down to Greenwich takes about an hour and passes the Tower of London, Tower Bridge and the whole of the modern skyline.

Greenwich at the far end has the Cutty Sark, a park with a serious hill and a view back over the city, and the Royal Observatory on top of it.

The paid attractions, ranked by whether they are worth it

The Tower of London — yes. The crown jewels, the ravens, the armour, and Yeoman Warder tours that are genuinely funny. Book online in advance.

Warner Bros. Studio Tour, the Making of Harry Potter — yes, for the right child, and it is unmissable for that child. It is in Watford, north-west of London, reached by train and then a shuttle bus, and it takes most of a day. Tickets must be booked in advance and sell out weeks ahead.

Legoland Windsor — a full day out, about an hour from central London by train to Windsor plus a shuttle. Best for roughly ages 3 to 10; older children find it thin.

The London Eye — half an hour, a good view, and a queue that can undo the good work. Book a timed slot.

London Zoo, in Regent's Park, is central, walkable and well done, though not cheap.

Practical notes

Under-11s travel free on the Tube, buses and river buses when with a fare-paying adult, which removes a real cost. Buses are slower than the Tube but street-level and far easier with a pushchair — the number 11 and the 24 pass a great deal of central London for the price of a single fare.

Almost every museum has baby-change facilities and a cloakroom; use the cloakroom, because carrying coats through a warm museum is how a good morning goes wrong.

Finally, do not plan two big museums and a paid attraction in one day. Two things is the London family maximum, and the second should be outdoors.