In my fourth grade classroom for field (as I have mentioned) they do art every Friday. This past week they worked on symmetry and congruency. I thought this was a fun and neat project for them. They had to make sure that (like a kaleidoscope) the sides were symmetrical with one another, so that if it was folded, it would be the same on both sides. This helped students also learn the concept of congruency (things being equal to one another). Here is some of their finished works of art :)
Click here for a great link to other symmetry and art project ideas this teacher gives in her blog. She has some Robert Munsch art projects in there, and those are some of the greatest books, kids love them. Great link for teachers in the younger grade (especially first).