You can pick up a toast from the Visitor Center between 17:00 - 17:59 real time. (Basically between 5pm - 6pm.)
Can be found North-West of the island, by the shore.
Goal is to hit the ball as many times as you can.
10 hits gives you a Golden Feather 20 hits gives you 50 coins 30 hits gives you a Baseball cap and the achievement