Joe and Lauren get the help of experts to design dream dens for children. Claire House Children's Hospice is a BBC Children in Need-supported charity in the Wirral. They do an amazing job looking after children with life-limiting conditions as well as providing much needed care and support to their families. In order to help more children than they can at the moment, they are opening a new site in Liverpool and that is where the Dengineers come in. With the help of all our on-screen designers, and the Blue Peter audience, we are going to build an amazing den for the children and their siblings to enjoy, where they can make happy memories. This is the biggest build ever attempted by the Dengineers!

Astrid is nine years old and lives in one of the UK's most famous summer hot spots. But unfortunately for Astrid she prefers the winter and loves Christmas. She wishes Christmas could last all year. She needs a Christmas den so she can enjoy that special day all year round.