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 fun challenge at a residential camp, especially if you have girls interested in the Percy Jackson books. You can preview the kit here. The sample includes a day in the life of an ancient Greek girl and monster identification
The challenge kit and the crest is available from e-patches and crests.