patterns on the light projector

I filled up this clear Ikea container with an assortment of colorful transparent objects and worked with the children to make patterns. 

First though, I let them explore on their own and they dumped objects on the projector in their haste to touch and see everything at once:

Then I explained how we had to place the objects with purpose and notice the effect it made on the wall projection, and how we could organize the materials to make patterns:

These were the results: 

Images from the projector are a lot more colorful:

Some dialog from the children:
K: If you put this one on top of this one the reflection is orange.
K: No, don't put that one there it doesn't look nice. 
D: Sprinkle it all over the place! Oh, it's getting more black. 
K:Can you hand me those squares?
D: Those aren't squares, those are angles. 
Ms. Erin: Rectangles?
D: Yeah. Rectangles.