
Chester Zoo
Excellent, but it is a lot of walking. Reviews rate 5 to 10 as the ideal age and still recommend a pushchair at four. Climbing frames, water play and sand pits break up the distance.
Chester, Cheshire

Staff talk to children, not over them. That makes more difference than any display case, and it is why this one lands better than its size suggests.
The museum lives in the surviving buildings of Chester Castle, which is worth the walk on its own, and it tells the story of the Cheshire Regiment and the county's other units from the seventeenth century to the present day. The immersive bits are what work with children: a trench you walk through, a barracks laid out as it would have been, and cases you are invited to open instead of peer at.
Five pounds for an adult, three for a concession, ten for a family, and the ticket stays valid for a year. There is no published child rate, so with two or more children the family ticket is the obvious move. Nobody is going to upsell you a guidebook at the till.
Then the opening pattern. Thursday to Monday, 10am to 4pm, last entry 3.30pm, which rules out exactly the sort of rainy Tuesday when you most want an indoor hour. Build it into a city centre morning instead: museum, then the amphitheatre five minutes away, then lunch. Under-fives will get less out of it than the six-plus crowd. There is a lot of reading and a lot of glass.
Looking for more museums & science near Chester?

Excellent, but it is a lot of walking. Reviews rate 5 to 10 as the ideal age and still recommend a pushchair at four. Climbing frames, water play and sand pits break up the distance.

A small entry fee now, then a pay-per-play card for the attractions: a giant sand and water quarry, mini golf, go-karts and play areas, funded by a world-record ice cream shop. Cheap after 3.30pm, glorious in any weather.

A mile of muddy obstacles, wobbly bridges and enormous slides through a Cheshire valley. Children come off it filthy, soaked and asking to go round again. This is the point; dress accordingly.

A ruined castle on a crag with views from the Pennines to the Welsh mountains, a reconstructed Bronze Age roundhouse and woodland paths below the walls. Castles do not need roofs to work for this age group.

Chester's Roman story done properly: real tombstones from the fortress walls, a hands-on natural history gallery, and a walk-through period house at the back. Free, central, and the right size.

Chester's Victorian park above the river, with a miniature railway looping the lawns, a good playground and open-air theatre in summer. Pair with a boat trip from the Groves below.