For a simple project, we made a patchwork magnet. It took a small square of
cardboard, a little larger square of fabric, a decorative felt shape, such
as a heart, and a button. Layers are in this order - bottom layer is
cardboard, then fabric square, the felt shape, the button. With crochet
thread, thread the needle and take one stitch - down through the button hole
and then up - leaving a tail through both button holes to tie in knot or
bow. Clip long hanging ends. Needle threading will drive you insane so a
threader is a must, since you will need to assist most everyone at least
twice. Strip magnet with an adhesive backing is cut into an inch strip and
attached to the cardboard. This is make & take.
I'd say if they can sew on a button, they might be ready for something else.