not sure if you have anything like this in your area but our town has a Botanical Gardens and they've decorated the whole place with scarecrows made to look like different movie stars. its really cute and the kids love it!
most places have things like corn mazes, pumpkin patches, hay rides, etc...
or you could go pick apples at an orchard and them bring them home to make a pie :D
get some fairy dust, bubbles, a pinata, bake a cake, get some party music, play limbo, bubbles, play with fairy dust, dance....have a spontaneous party, and make preparing and cleanup part of the fun! drumming......pin the nose on the clown.....just have fun!
my town is having a halloween trick or treat night downtown i think this week you should check into something like that for you and the kids in your area..there are also some festivals going on for halloween in diff area's...hope you find something..✿◕‿◕✿