When I can be bothered I make marble sized balls from some uncooked porridge oats and water, embedding a thin cord (tie a big knot in the end and form the ball around that).
Bake it in the oven until dry and hard - they will keep in an airtight container - bit like boileys for baiting carp.
Hang up at the end of the garden and plink away - when hit you get a lovely cloud of flakes. The oats then get eaten by the birds and other four legged creatures or disappear into the soil.
You can re-use the cords for the next set.