You could teach them crochet or knit and have them make little gifts - hot pads, or scarves...
you could do baking and teach them to make bread or cookies or cupcakes or whatever.
You could do clay crafts - air dry clay as well as the polymer clay (if you have an oven to bake it in). Acrylic paints work well on the air dry clay...
You could also do paper crafts - origami, make your own paper, scrap booking, making pictures with torn construction paper, etc.
Or, you could do string art, or paper mache, or . . . . .