The island that the Flamingos sit on in Kilimanjaro Safaris supposedly has been interpreted to be in the shape of a classic Mickey head.
On the blue dino holding the sign for Chester & Hester's Dino-Rama, his left wrist has a classic mickey.
Before your time rover makes the jump back in time, look to your left at the dry erase board.
Finding Nemo - The Musical
In the bottom right corner of both of the signs announcing the show times for the day, there is a hidden mickey made out of the bubbles.
In the regular line, you enter a building. In the second room, towards the end, in the third to LAST tall glass case, there are pieces of paper with ink splatters on them. One page has two HMs.