Sad news to report, but the LBR monthly in-store build for kids is coming to an end with the December 2014 gingerbread house as the grand finale. Apparently the program became a victim of its own success, drawing crowds of hundreds of kids to stores that only hold about 50 people at a time. I imagine that this isn't the shopping experience that LBR is trying to promote, and I wouldn't be surprised if people (especially us here in America) over the 6 years began to treat it as an entitlement - showing up every month to get the freebie and never spending a dollar in the store. So the MMMB program is being phased out. Rumor is that 2015 will bring something more "activity-based" for kids, most likely available for an extended period to spread out the crowds. I think we will see details emerge by the beginning of December when the January calendar is published.
The first store mini build in December 2008 was a very simple snowman #MMMB001
that only had 11 pieces. Seems no one managed a scan of the official instructions, but there is a recreation here
if you want to build your own. There have been 81 models over the 6 years, with an occasional double month and a couple of months where Europe and North America had different models in a given month. You can view the Brickset MMMB category
to see them all.