2 places in Wilmslow & Styal, Cheshire, 1 of which cost nothing. Everything below is within easy reach if you live locally.
Money lives in Wilmslow, but the best of it for children is free. The Carrs runs along the River Bollin straight out of the town centre: flat riverside paths, stepping stones, open grass for any picnic, and kingfishers for the patient. Keep walking downstream and the woods eventually deliver you to Styal and Quarry Bank Mill, which is the day out proper.
Quarry Bank is one of the National Trust's best days for this age group, a working cotton mill where the looms still clatter and the Apprentice House tells the story of the children who worked them. It needs most of a day, so do not tack it onto something else. Tatton's deer are fifteen minutes away at Knutsford, Alderley Edge's woods and wizard legend ten minutes south. For a commuter town, the walking is remarkable.
71 acres of riverside parkland on the edge of Wilmslow: play area, tennis courts, outdoor gym, and a flat path along the River Bollin that runs all the way to Quarry Bank at Styal. The best free walk-to-somewhere in this corner of Cheshire.
A working cotton mill where the looms still clatter and the Apprentice House tells the children's side of the industrial revolution straight. A new Play Hub inside the mill and river walks outside round it off.
Not in Wilmslow & Styal, but close enough for a day out.
A prehistoric trail winding through a garden centre, with interactive bits along the way. Under-2s free, and there's a café and indoor shelter if the weather turns.
The reliable default: gardens, a children's zoo, a big playground and plenty of room to run. Pay for parking, nothing else.
High ropes and treetop courses in the grounds at Walton Hall. Reviewers rate the value, but frame it as one for the bigger, braver kids.
Inflatables in Old Market Square every day, plus a rotating Wednesday programme across the parks and a Thursday session in Time Square. No tickets, no booking, just turn up.
A theme park deliberately built for ages 2 to 13 rather than teenagers, so both of them can ride most of it. The classic full-day option on your doorstep.
Farm animals, outdoor play and indoor barns, so a wet forecast doesn't cancel the day. Well matched to the 3-8 age range.
Two-tier soft play frame, low climbing wall, pirate ship, crawl tubes and a bouncy slide, plus Messy Monday and sensory sessions during the week.
Bigger than the average soft play: multi-level frame, a spooky room, an astro slide, a climbing wall, two mini bowling lanes and a slot racing track. The bowling is what makes it work when you have a toddler and a seven-year-old to keep happy at once.