Just went out and got some Halloween decorations. I want to have a Halloween party for the kids…

Just went out and got some Halloween decorations. I want to have a Halloween party for the kids closer to Halloween and possibly a sleep over . I'm still trying to come up with some ideas and games for the kids. They will be ages 3 to 11 . More older kids than little . I have Pinterest and I have some ideas from there but what are some good ideas that don't take up much time to do and isn't so messy!?