The Dengineers

For eleven-year-old Ben, a camouflaged adventure bunker with a secret entrance would be the perfect way to make new friends.

Sami and Nadia need their own soundproofed rehearsal room. A massive music amp in the corner of the garden could be the perfect solution.

A massive Manchester United fan, ten-year-old Billy, needs a purpose-built football den to help get him closer to Old Trafford.

With bikes being kept in every room in the house - including her bedroom, Ella's dream den is a Hawaiian beach hut where she can escape.

Best friends Jazz and Katelyn love dancing and want to put a dance studio in Jazz's mum's cellar.

Eleven-year-old Nathan wants to be a chef and is after a kitchen hangout where he has space to practise his own culinary creations.

Nyobi needs more room, a proper desk space, and better materials to work on her art and design projects.

Ten-year-old Ben is desperate for a den with enough space for his beloved train set.

Sienna really needs a new bedroom, which can double up as a spy den, with lots of techy gadgets inside her top-secret lair!

The pupils of the Lancasterian School, all with complex medical conditions, need an exciting wheelchair-accessible outside space.

Presenters Mark and Lauren look back at all the dens they built and reminisce about the great kids they encountered.