The idea of the body parts is very good.
I have developed one for the visually handicapped. At least I call it that.
What I have is a sheet of half vases. You know the mirror image thing
which makes a face if it
is bilaterally symetrical.
Anyway, I have a worksheet of half of the vase. Usually 10 small halves
per sheet. The student does the other half to match on each. I let them
turn it upside down for the left handers etc... Each person has a
dominant eye and hand for doing this.
Its very revealing. I have only done this at high school level. I think
lower grades could do it.
It sure tells you were you are with the children. Of course, simplify
this as you go down in age.