Sea cadet Jonny became fascinated with naval history through his grandad and is now a huge fan. He wants a submarine-themed den where he can celebrate his passion, learn more and enjoy hanging out with mates.

A nine-year-old who lives in one of the UK's most famous summer hotspots longs for a Christmas-themed den where she can celebrate her favourite season all year round.

Joe and Meryl take a look back at memorable moments and amazing dens from the series.