The other day my friends set out to make some pinecone birdfeeders. They slathered on some peanut butter and stuck bird seed to them and hung them from trees. This attracted dozens of squirrels, of course, which in turn attracted a cat. It was a nice little representation of the food chain, haha. Anyways, the bird feeders are all gone and taken off by squirrels now, but it was a good idea. Just not super practical.