Mark and Lauren get the help of experts to design dream dens for children. With her mum working 12-hour shifts, Sienna has to spend most of her time at her nana's house, but the space is a bit boring and not really a great place to hang out. Add in Sienna's love of spying, and it seems that what Sienna really needs is a new bedroom which can double up as a spy den, with lots of techy gadgets inside her 'top secret' lair.
Running Time: 30 minutes (approx)
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