you get it in HQ
the cap is in the corner
It is in the gadget room hanging on the coat hook next to the door.
In the corner of the Gadget Room, there is a shelving unit and the large propeller hat is on the left side of the central shelf.
you just have to do it
Mysterious tremors
look up that questoin again and get the one with step by step steps to do it but when you need the propeller cap for the puffle i am cluless on where it is.
you fly it by dancing. but you can not have any items on except the propeller cap.
Gadget Room!
it is to be a member for free
I found it at the dock
hidden-cant tell
You get it in the Festival of Flight.