Who: Mystery People (Felix and Audrey, tbh who else?)
Where: Scotty's room to start
When: 10am-ish - once Team Adult have all gone down for their naps
What: Scotty doesn't know.
There's nothing to indicate this will be an unusual day until Scotty leaves his room. Upon his return, it appears that the mischief fairies have drafted him for a little game! How exciting! The first clue is placed in his bedroom; it's up to him to find the rest in the chain.
( Scavenge this. )What he does with these images and clues once he has them is entirely up to him.