Panda and Polar bear decided to switch jobs for the day; it works out well for one of them. Afterwards Panda, Polar Bear, and Penguin decide to spend the day at the beach.
The visitors can't tell the difference 
between different bears.
Los visitantes no se darán cuenta de 
la diferencia entre un oso y un panda.
Los visitantes no notarán la 
diferencia entre distintas razas de osos.
Les visiteurs ne font pas la différence
 entre les races d’ours.
Os visitantes não vão perceber
 a diferença entre os ursos.