This one has fifteen ideas on it, a mix of the Halloween sort and the ordinary autumn sort. Pumpkin patches, toffee apples and spooky stories, but also a crisp autumn walk and a local fair. Enough to fill half term without anybody having to plan anything.
Print it, stick it somewhere everyone can see, and cross things off as you go.
It is free, and there is nothing to sign up for. There is one for every month of the year if you would like the rest.