It's good to whisper in the dark!
Birthday tips October — Dark Crawl: From tables, chairs, cardboard boxes, air mattresses, blankets, sheets, etc. you can build a sinister crawl tunnel. When decorating the dark crawl you can get creative and include all sorts of household items.
Put wigs on inflated balloons and hang up the heads.
Got any more ideas? Maybe use the plant sprayer for an eerie 'mist' or a tape recorder with spooky sounds?
Dark dance: When it's completely dark, everyone holds hands and in the first round walks slowly in a circle clockwise with big steps. While doing so everyone murmurs: 'Rhubarb, rhubarb...' In the second round the direction is changed and the pace is increased.
By the way: If you ever encounter a real ghost, you'll recognize it because it casts no shadow and can't be seen in a mirror either!
Halloween: Don't forget, October 31 is Halloween! Dress up yourselves in bed sheets as ghosts, arm yourselves with spooky lanterns and go through the streets.