Open Fridays 10am-4pm and Saturday & Sunday 10am-5pm
Where imagination runs wild
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Indoor Adventure

Discover the Best Indoor Adventure Park in Yorkshire

William’s Den’s ‘show stopping’ indoor adventure park aka the Indoor Den. Created by renowned experts in play, the indoor adventure park was built by skilled craftsmen who use sustainably sourced materials from our very own surrounding woods.

The ultimate destination for an exhilarating indoor adventure! We offer a one-of-a-kind experience that combines the thrill of an indoor adventure park for the whole family with the excitement of a kid's indoor playground.

Not Your Average Children’s Indoor Playground

If you’re looking for a kid's indoor playground near you, look no further!

Williams Den is the perfect place for your children to explore, play, and let their imaginations run wild. Our indoor playground is thoughtfully designed to provide a safe and stimulating environment for children of all ages.

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Ancient Oak

At the centre of our indoor adventure play area stands the mighty Ancient Oak – a spectacular six-metre-high climbing structure designed to spark imaginations and encourage active play.

Children can climb inside or scale the outside of this incredible tree, which links to a treehouse packed with adventure. From rope swings and wobbly branches to balancing poles, bridges and a three-metre slide into a sandpit, it’s the perfect hub for energetic explorers.

The Ancient Oak is fully integrated with the rest of our indoor den, making it a favourite for families looking for fun things to do near Hull – rain or shine!

indoor rainmaker

The Stream

Fancy a dip? You're in luck.

Our indoor adventure play includes a magical water play area featuring a cascading stream, shallow pools, and our ever-popular rainmaker, which creates a playful indoor rain shower that little ones absolutely love!

Kids are drawn to the splashy fun, so don’t forget to bring a spare pair of clothes – they’ll be soaked, smiling, and asking to go again. Kick off your shoes, roll up your trousers, and enjoy a paddle together. It’s a sensory experience that’s just as fun as it is memorable.

indoor den climbing spider net

The Glade

Perched high above the action, Forest Glade and Eagle’s Rest offer the perfect lookout to take in the full view of our indoor adventure play.

From here, kids can choose their next challenge – climb down through the giant nets, or make their way across two rickety bridgeways to reach the heart of the Den.

It’s a brilliant spot for a bit of adventure – and a great place for parents to spot their little explorers in action!

sand play and slide indoor play

Sand Play & Slide

Our indoor sand play area is a hands-on paradise for curious minds and busy little builders.

At the centre, you'll find our tunnel slide, perfect for swooping down into the soft sand below – but the real magic is in the interactive play features all around.

Kids (and grown-ups!) can work together to pull buckets of sand up using ropes and pulleys, then send it tumbling through a series of tunnels, chutes and moving parts. With sand sieves, wheels and conveyor-style gadgets, it’s all about experimenting, problem-solving, and having loads of fun in the process.

Get stuck in – it’s messy, creative, and completely absorbing… just how play should be!

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