This lesson was done with 6th grade - but is also suitable for upper elementary.
Might be interesting to try it with clay relief (using carving and
additive techniques) - Then give finished work a wood look patina
(using brown and black acrylic paint). Make door and door frame from
clay slab - wire door on after firing and painting.
I have her lesson linked to elementary and middle school lesson page.
Her lesson also includes a mini lesson in perspective drawing.