It's the £3m adventure park which gives kids an open space to climb trees, paddle, build dens and explore with their friends.

William's Den in North Cave is the UK's biggest bespoke indoor timber play experience, which includes a 475sqm play barn and extensive outdoor play.

And for a short time, a special offer means you can take your little ones after school for just £3 entry on a Thursday and Friday until November 24.

Jasmine Lovell on the zip wire at William's Den
Jasmine Lovell on the zip wire at William's Den

Usually, it costs £9.50 a child to enter the park, which is open until 7pm on these days.

The owners have also reduced their rates for toddler and pre-school visitors and their parents, who can visit between 9.30am and 3.30pm on Thursday's and Friday's for £3 for adults and under 3s, and £5 for children aged three and over.

There is no charge for babies under 12 months old.

Indoor play

William's Den.
William's Den.

The Den is a 475 square metre indoor play barn and is a world away from the usual soft play centres you may have found yourselves in over the years.

From the Tree House to the Forest Glade and the Eagles Nest, The Den is is made of wood and full of sand, water, nets, bridges, and there's even a pole to slide down.

There's plenty to keep children amused in here and adults can watch from seats around the edges. If the kids want a rest there's even a hideout relax zone.

Outdoor adventure play

The attraction is set to be the UK's biggest bespoke indoor timber play experience.
The attraction is set to be the UK's biggest bespoke indoor timber play experience.

Outside you will find find a huge sandpit where children can pump water, dig in the sand and splash in the little river.

The rest of the outdoors, which is surrounded by beautiful countryside, is like a huge park. There's also a long zip wire, nets and a huge spiders web.

There's also plenty of large sticks to make a den with and a dedicated toddler area called the Fort Yard, which has little ride ons for them to enjoy.

The entire place has a free-range and natural feel about it and it also feels safe for children to explore - although adult supervision is mandatory.

The facilities

The dining area at William's Den
The dining area at William's Den

The Kitchen Table restaurant - which you can visit without paying to get into the actual attraction - does a range of food, including pizzas made by the chefs in wood fired ovens as you wait, and watch.

There's also the Snack Box for buns and cakes and an ice cream counter.

For the parents it's licenced too, so you can enjoy a glass of wine whilst the kids play.

The owners have no problem with you taking your own food in, so you can enjoy a picnic on the benches there or on the grass, you just can't eat your own inside the restuarant.

The toilets are clean and spacious and there's even double cubicles for you and your little one. There's baby changing facilities and the kids soap is brightly coloured which encourages them to actually touch it.

Need to know

William's Den, Castle Farm, North Cave, HU15 2LS is open everyday from 9.30am. From Sunday to Wednesday it closes at 5pm and from Thursday until Saturday it is open until 7pm. In the winter it closes at 4pm Monday to Wednesday.

Usually, an adult ticket is £8, children £9.50, under 3s £3. There is no charge for babies under 12 months old.

Book online to save 10 per cent. Call 01430 472230 or visit www.williamsden.co.uk for more information.