Bean bags are fast and easy, and give them something to play with afterwards. Line up some buckets or bowls across the floor at different distances and let them stand in one spot and throw their beanbags in.
You can put actual dried beans in the beanbags if you have nothing else, but if they get anywhere near moisture they will swell and rot. Those beanbags won't last very long. There are plastic granules you can buy in craft stores for making beanbags and weighted bottoms to toys. Those would be better and safer.
Another idea to sew would be aprons. They can give those as gifts for Christmas.