This is not a Girl Guides of Canada challenge but rather one from e-patches and crests. It is, however, designed to be completed by Girl Guide units. They sell challenge kits for $5 per kit.
It would be a good challenge to do around Halloween. You can preview the kit here. The sample included two stories about the history of Halloween, several recipes and a pumpkin word search.
The challenge kit and the crest is available from e-patches and crests.