In the scene where the cards are painting the roses red look to the left on the bush by the first card. You should see a Mickey made of red paint dripped from the brush.
Near the beginning of the ride after you leave the library you pass through a set of doors. There is a Mickey on the right door on the bottom left of the window.
At the end of the ride just before the toy room look to your right and there is a model ship on display. Pay attention to the top of the case to see a set of Mickey Ears.
