The Dengineers

The Dengineers build 11-year-old Ben a camouflaged adventure bunker.

Sibling rockers Sami and Nadia need their own soundproofed rehearsal room.

A massive Manchester United fan, 10-year-old Billy is in need of a football den.

Ella wants a den to escape the 35 bikes that are kept in every room of the house.

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

Eleven-year-old Nathan wants a kitchen hangout where he can practise being a chef.

Nyobi needs room, a desk space and art materials for her design projects.

Ten-year-old Ben wants a den with enough room for his beloved train set.

Sienna really needs a new bedroom which can double up as a spy den, with lots of gadgets.

The pupils of the Lancasterian School want a space that everyone can hang out in.

The presenters look back at all the dens they have built throughout the series.