How do I get to the "InnerSpace Shop" in Tomorrowland to get that hidden mickey?
There are quests in Tomorrowland that lead to the Inner Space Magic pin, which you would need to get into the store. Before I explain that, the quests are:
Dive Magic Pin (starts in Captain's Quest Quarters)
You would need this pin for the other two quests:
Autopia Quest (There are four. The blue quest is the easiest to do, and you don't need more than one car to get the Space Magic pin.) This starts in the Autopia Quest Track.
Inner Space Magic (Starts in the Space Mountain Quest Deck). You're going to need the Dive and Autopia car magic pins (and be sure to get your Driver's License pin at the Autopia Quest Track after you put on the car pin.)
Once you get the Inner Space Magic, you need to be able to use the magic in the Inner Space Shrinking Room. The best way to get to where you need is to go to the Space Quest Deck and use the exit by the space suits on the bottom level of the room. This leads to the space walk platform in the Inner Space Shrinking Room.
Activate the Space Magic (by double clicking it after using the magic wand button or saying, "Space!") and click your mouse past the barrier line into the room. The exit toward the actual "machine" and that leads into the molecules room, and you'll find the Inner Space Shop entrance from there.
I know it seems complicated. The easier way people were getting into the shop happened when the red space suit magic was a theme park quest prize (prior to VMK Central closing in the parks.)
FYI, finishing the Hidden Mickey Quest doesn't really do much nowadays, since there is no place in the parks to redeem the prize. I don't even know if completing the quest even gives the .pdf file prize anymore.