The kids wanted to go trick or treating for Halloween, so we ended up doing some quick Halloween research and reading and decided that the proper way to do things was not to do the commercialised going around begging for candy but to give the neighbours candy. However we had no time to prepare for that and 10yo's birthday was kind of vaguely in the vicinity so we decided to do a "spooky themed" birthday party instead.
10yo did up a master list comprising of other lists, and lists for food shopping and various party supplies. JJ took care of the food as he usually does and Nanna and I split shifted picking up party supplies over a couple of weeks.
One of the things 10yo had wanted was a banner so she and 8yo worked on making one up: