He loves feeding the piggy bank. He does not understand money. This is just fun for him and he thinks he is feeding the pig.
He also likes pointing out to us that the pig is wearing a hat.
The pig also sings Take Me Out to the Ballgame.
So I guess he also likes making the pig sing.
Once he finished he was ready to do it again, but he was out of money. He tried dumping it out.
Then he remembered where Mommy and Daddy got it from and took off to get more.