howdy sir Farmer! yeah I've read about the insides being used for all kinds of things like one of your commenters said. In Texas they call them Horse Apples because horses love to eat them and the tree is the Bois D'Arc tree and the great Caddo Indian nation from Northeast Texas made the best bows from the wood of the tree because it is the strongest but most flexible and they would trade them to Indian tribes all over the nation. The wood is also very resistant to rot so farmers like to use them for fence posts.

But the best use of the apples is for targets because they explode real nice!