Trick-or-treating is not only a fun Halloween tradition but it's absolutely free. All those free chocolatey hand-outs? Count us in. While there are some neighbourhoods in Singapore that welcome a trick-or-treat knock on their doors, it's not a common practice here, even on October 31. To not dampen your spirits this spooky season, we've rounded up the best free Halloween kid-friendly events and not-so-kid-friendly parties for you to get the heebie-jeebies without spending a cent.