As noted my my Nov. 29 blog, Lego research showed girl's play in the first person while boys play in the third person. Lego also learned that girls assemble kits casually, liking to stop and play; boys race to completion.
Thus Friends kits come in numbered bags and each, when completed, creates a playable scene. They are also extremely airy. Buildings are often facades with no tops and scant sides. Some kits have nothing but the furniture and fixings
Open-sided kits are common - Harry Potter sets were similar, but sides and roofs were usually included, so they looked good if placed properly. But the Friends sets sometimes only look complete if you're at eye-level and squarely in front. From any other angle, it looks like an air force came through and bombed the place, only without the rubble and craters.
So I've made a few quick additions, shown here. But to keep the ability to enter the Friends universe and play first person, I made it all detachable. With little effort, the original kit is exposed and fully playable.
Details continue to impress: a yardstick, laptop, and cellphone in Emma's fashion studio, A microscope and (my personal favorite so far) a vice in the invention workshop (It doesn't work, but just the ability to give a recognizable mini-version of one is pretty creative; it's blue with gray jaws on the right of the pic).