Honestly, I thought Grade 2, Chapter 6 was going to be a tough lesson to get through, but it actually went over pretty well with my students.
They really seemed to like the visual illusions. I showed pictures similar to the ones in the book (old-young woman, etc) and asked them questions to make sure they saw both images.
For example:
- If this is an old woman, what part of her face is this? Mouth!
- If this is an young woman, what part of her face is this? Neck!
That sort of thing.
I also showed them a video of this live performance group, Fighting Gravity. It fit with the whole "illusion" theme and my kids really seemed to enjoy the video. You can actually download the different performances off their website, which was nice because the quality is pretty good.
http://www.fightingravity.com/I'm uploading my powerpoint. It's nothing special, but maybe it'll give a better idea of how the lesson went.