Decor

After entering the house via Platform 9 3/4, we kept it fairly simple.  Every Halloween we decorate the ceiling with bats and a spider web anyway, so we did that a little early for the party.  We made a simple Hogwarts interior with stone backdrop and floating candles above the cake table.

Black crepe paper, construction paper, tape, and fishing line

We fortunately had a dining room light that looked a bit Hogwarts-ish.  I added a 99 cent brick backdrop and hung candles from the light, also from the 99 cent store.