The slot says INSERT COIN
On the theatre's wall: "IT SAYS…. INSERT COIN!"
Nudge 1Where to look
It wants exactly what it says.
Nudge 2A stronger push
Coins lie in a library on another set.
Nudge 3Almost there
What you needOther problems to solve first
Solve these first (each opens its own page, no answers on the way):
Show the solutionThe whole answer, with a video
Carry a dollar piece to the slot: "ILL PUT THE COIN INTO THIS SLOT!". That's the machine paid for; the switch is next (The switch in the theatre is electrified).