Mezuzahs
When we did our "Jesus was a child" unit we did a carpentry art project -- mezuzahs out of wood. Their appearance was like a rectangle box without a lid. We provided wood pieces precut and predrilled for the younger kids. They sanded, hammered in the nails and used markers to write the Hebrew letter Shin on the outside, and of course enclosed the Shema inside it. Wikipedia has info on mezuzahs and the text in Hebrew at this link: http://en.wikipedia.org/wiki/Mezuzah