Monsters Inc. Easter Egg - Hidden Mickey's

There are a few hidden mickey's in Monsters Inc..
1) During the opening credits, there is a door which opens. In one shot, a small toy truck can be seen on the bottom right hand side - on the side of this is a Mouseketeer hat...
2) As Sully is leaving the snow cave, a three circle mickey can be seen on his back as he turns to ski out.
3) On a easel in Boo's room, a drawing of Mickey can be seen (best seen at the end)