chicken drop. you buy a ticket and are assigned a number. chicken is placed on large wooden plank that is divided into squares and each square is painted with a number. if the chicken shits on the square with your number, you win.
Here's a link to my recent trip. It has info on fishing, snorkeling, cave tubing, zip-lining, birding, Mayan ruins, jungle river canoe trips, Baboon Sanctuary (howler monkeys), the zoo and more. Oh, and even a photo of the Chicken Drop.