Love your invitations Cathy!
I love buttons
are you looking for favors? or centerpiece kind of ideas?
a fun table decoration might be jars full of buttons
i have several decorative jars filled to the brim with vintage and not so vintage buttons. If you really wanted to use them on the table, you could use some styrofoam (or florists foam) in the middle, then the beads or buttons areound that -- to make it look filled, but not really.
you could make some quick and easy sachets with 6" squares of fabric, pinking around the edges -- does your mom embroider? you could have monogrammed napkins with your mom's initial, that could be a sewing touch
have you ever seen those little dolls that are put together with some string, spools and buttons? the spools are the body and then the legs are made of buttons.
an amish quote I have always loved is:
what is stitched with love will never tear
you could somehow use this with little needle&thread kits for favors
i will have to think some more too