There are two main groups:
there are subgroups in each group
each subgroup has to collaborate with the others
There is a succession of quests Every quest will include:
Each subgroup has to find clues, they need other groups to finish the quest.
Abilities related to the roles & complementary → clues for example the Faun can see some magic indices that the other subgroups cannot see with augmented reality
Each subgroup (or child) has a smartphone
real-time subgroup localization
Realtime
Subgroups
special events: mini-mission
(letters?) random reward
headphones
final quest
They will be engaged and motivated to beat the other team, stressed by the time and motivated to cooperate