For the slytherin common room, i would just decorate it with green and silver/grey streamers and balloons, and fake snakes. Not sure about the great hall, but for snape's study, you could make fake potions for decorations. there's a how-to somewhere on this site i know.
Boards
Recent Posts by Melissa H.
-
HARRY POTTER PARTY
Started over 1 year ago · Last post about 1 year ago ·