There was a really cool build activity during the midnight launch of the LEGO Stranger Things: The Upside Down (75810) where you get to construct the fort which Will Byers built near his house.
It consists of 48pcs and the parts appear to be quite easy to source. However, there are a couple of stickers that were only given out at the event. If anyone has the a high res image of the graphics do drop us a message!
Good hunting everyone!
(Via Brickset and special thanks to James Blair)