While exploring for fossils, the Polos find a single bone and try to figure out if it belongs to a dinosaur.
Lily wants to go swimming in the Amazon River, but first, the Polos help her check out what kind of creatures are in it.
When Gorby goes to water his flower but the PoloMobile's water tank is empty, he gets an idea to follow a herd of elephants to a watering hole to refill.
Marco wants to take a selfie with a cool underwater sea creature, and gets a most surprising one with a Great White Shark.
When the PoloMobile gets stuck high in a tree in the Amazon Rainforest, the Polos are inspired by some spider monkeys to 'take a big swing' to get free of the foliage.
While the Polos put the finishing touches on a gift for Nash, they mimic the guarding actions of the meerkat to assure that Nash doesn't get an early glimpse of the gift.
When Willow's noisy gadgets go wayward, the Polos round them all up, but even after they turn them off, the loud buzzing sound they hear continues... because it's being made by cicadas out in the forest, a whole lot of cicadas!
Gorby's never been the 'first' at anything, and he wants to change that - by being the first person to walk on the moon! Chester knows that humans were the first to visit the moon many decades ago, and he worries that if he tells Gorby that, he'll upset him.