Click on the letters and a corresponding animal will appear where the letter is. The animal will disappear. In order to make the animal reappear, press that specific letter key on the keyboard. EX: If you wanted the "Cat" to reappear, press the "C" key on your keyboard. Once animals reappear after pressing that corresponding letter on the keyboard, they will permanently stay there unless you click the green flag at the top of the page. The green flag allows all animals to change back to letters like the animation was at the beginning.