You need to get some grid paper and ask kids to create some pixel art as a fun project idea for the classroom.
Tree of number
The Tree of Numbers is a math project involving activities with glue, toothpicks, scissors, crayons, colored and brown construction paper, and neutral paper.
Makedo Windball
Makedo Windball is a simple, yet unique geometry project. All you do is assemble simple cardboards and turn them into a kind of art form.