The Dengineers

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

The Dengineers transform a youth centre's outside space.

The presenters look back at some of the amazing dens from series one and two. Here, Lauren revisits the survival, art, Hollywood cinema and DJ dens.

Eight-year-old Oscar lives in Scotland and wants an Australia den so he can remember his Aussie hometown.

Twelve-year-old Luke is passionate about black history and wants people to realise how important it is.

Ten-year-old Florence from Oxfordshire wants a cool hotel den so that she can relax, hang out with friends and be on holiday whenever she wants.

Ballroom dancer Harry from Dudley is a huge fan of Strictly and wants a den full of glitz and glamour to help him practise his dancing and store his trophies.