I try and keep the blind closed in the Lego room for fear of yellowing, but seeing as it's also a guest room and family are here a LOT helping out with childminding, in reality I have very little control over that blind!
Dusting my Lego is on my to-do list, after sorting the unsorted piles, repairing some models that got damaged at Culture Night, hanging the Lego Town posters I got for Christmas, the list goes on :D