
Blackpool Pleasure Beach
The big one. Nickelodeon Land covers the primary ages properly while the Big One and the wooden coasters wait for brave older kids. August queues are real; go in expecting them and it is a great day.
Blackpool, Lancashire

The Blackpool branch of the wax museum sits right on the Promenade and pitches itself squarely at families: 14 themed zones, more than 75 figures, and the line-up runs to Marvel superheroes, Strictly, music and sporting names rather than world leaders. It is all indoors, which matters more in Blackpool than in most seaside towns.
Book online before you go, it is noticeably cheaper than walking up, and under 3s are free. Budget a couple of hours. The Wax Hands souvenir costs extra and is ages 7 and up, and a combined ticket with the Tower Dungeon or the other seafront attractions brings the per-place price down if you are making a day of it.
The Coronation Street zone includes a full Rovers Return set with a working bar, which will mean far more to the adults than to the children. The kids will be off finding Spider-Man.
Looking for more museums & science near Blackpool?

The big one. Nickelodeon Land covers the primary ages properly while the Big One and the wooden coasters wait for brave older kids. August queues are real; go in expecting them and it is a great day.

The Tower Eye's glass floor 380 feet up, a proper circus that still knows how to play to kids, and the famous ballroom below for a fancy ice cream. Buy the attractions you want rather than the bundle you will not use.

The UK's biggest indoor waterpark, kept at tropical temperature: proper toddler pools and mini slides at one end, big flumes at the other. Rainy-day Blackpool solved.

Elephants, gorillas, giraffes and sea lions in 37 acres that are actually walkable with primary-age legs - big enough to feel like a full day, small enough that nobody ends up carried.

A solid seafront aquarium with an ocean tunnel and rockpool sessions - the reliable wet-weather hour when the beach plan falls apart.

Blackpool's grand free option: Italian gardens, a big boating lake, one of the best playgrounds on the coast and model boats on the lake. The antidote to a wristband day.