We have been taking a look at MC Escher and he skill in tessellations, we had a look at some of his work online and There are some little videos on the MC Escher website (click downloads in the menu) that shows how his optical illusions work.
This was one of the projects where I had to kind of bribe Ebi-kun to stick with it. It didn't help that out first attempt was a disaster! To make a shape that will fit together you need to start off with a square and take a bit from the bottom and add that piece to the top then do the same with left and right. The first time we drew a curved line but when it came to cutting out it was hard to do it accurately so they didn't fit together well.
So... we started again but this time used straight lines and a ruler and it proved to be much easier to cut out. We made a couple of templates from card then cut out lots of shapes from construction paper, then the fun started. It wasn't until Ebi-kun started to glue the pieces and fitting them together that he really understood how clever it all is.
He stuck the pieces to a large piece of white paper first.
Then when it was all dry we cut it out, looks good on the dark background. Ebi-kun was really proud with it when he finished and told me he was glad he didn't quit. I am not one for forcing him into doing things he doesn't want to do but on this occasion I knew it the problem was that he didn't 'get it' coupled with the initial disaster.
From this, I made a mental note to make a clearer presentation and to try things out by myself before doing them together! I want to try doing it using the light table next...