The Self-Care Bunny Hall: a microdot?

“Gosh, a microdot? How clever!” exclaims The Keeper. “I haven’t seen one of those in a very long time.”

“I’m not sure it’s actually any help, however. I think this whole puzzle is a lot more low-tech than that, and you’re just going to have to solve it by brain alone. You’d better get back to it, in fact.”