DIY Skeleton Tee Shirt Tutorial by Robin Rosenthal for lmnop. There’s also a tutorial for how to make a monster potato print shirt. Grownups can do the cutting of the potatos and kids can proceed to stamp their own shirts.
DIY Stamp Out Stains Tee Shirt Tutorial. Easy tutorial from See Kate Sew here.
DIY Poetry Rocks and Pebbles. You can stamp them or use rub on decals. This would be another one of those gifts that kids could make or use. Tutorial for rub on decals (top photo) at The Write Start here. Tutorial for stamping the image (bottom photo) at Playful Learning here. *You can convert the pebbles and smaller rocks into magnets using really strong ones like these (but you must be able to find them cheaper elsewhere).