The Dengineers transform a youth centre's outside space.

The Dengineers build 10-year-old Aron his very own Bollywood den.

The Dengineers come to the aid of Carrie, a 10-year-old from Leeds who plans to celebrate her red hair with a gingerbread house den.

The Dengineers build 11-year-old Lola an old-fashioned cinema den.

Needing to go to hospital means Rufus often misses out on the play adventures he loves.

The team build 11-year-old Joshua his very own DJ den and take a visit of the BBC Radio 1 studios.

The team build 11-year-old Whitney her very own den to answer all her eco needs.

The team build 11-year-old Phillip his own den where he can build model planes.

Eleanor, 10, loves books, so the team bring the library to her - a magical library!

The team create a fantastic journalism den where Soibi can write news reports.

The team look back at all the amazing dens built throughout the series.