The gang hopes to find a moth for Hal; Nature Cat and his pals learn about the importance of sand dunes.

When Nature Cat and his pals set out to climb the Mighty Mountain Peak, they learn it is not easy; Nature Cat, Hal, Daisy and Squeeks try to avoid bug-eating plants as they roam through the swamp.

Nature Cat tries to keep a squirrel from stealing the food he puts out for the backyard birds; Nature Cat and his pals meet a little duckling.

Hal loses his beloved flying disc when it flies into a cave; Daisy finds a giant fossil that belonged to a woolly mammoth.

The Fred Rogers Company introduces a new animated preschool series featuring Peg and her sidekick, Cat, as they encounter unexpected challenges that require arithmetic and problem-solving skills. Each episode features two stories in which Peg and Cat face a math word problem that they must solve. Children will learn how to build calculation skills and think about larger concepts that will help them form the foundation for learning math at any level, from kindergarten through calculus.

The first series inspired by "Mister Rogers Neighborhood," "Daniel Tiger's Neighborhood" features 4-year-old Daniel Tiger, son of the original program's Daniel Striped Tiger. Every day Daniel puts on his red sweater, ties his shoes, and invites a new generation of preschoolers into the Neighborhood of Make-Believe. Daniel shares his daily adventures with pals O the Owl, Katerina Kittycat, Prince Wednesday and Miss Elaina. With the help of Daniel and his friends, preschoolers have fun and learn practical skills necessary for growing and developing.

This show follows the adventures of animated versions of brothers Chris and Martin Kratt, hosts of such educational shows as "Kratts' Creatures" and "Zoboomafoo." In the show, the animated Kratts encounter wild animals during stories of adventure and mystery. The live-action Kratt brothers introduce each episode.

Earth science and astronomy take center stage in this animated series from PBS Kids. Two neighborhood kids -- Sean and Sydney -- befriend the new kid on the block, Jet Propulsion, who just happens to be an alien from planet Bortron 7. Together they explore the solar system and how it affects the planet, while also learning about friendship and teamwork. The series features live-action interstitials with astronomer Dr. Amy Mainzer.

A yellow fusilier fish named Splash and his friend Bubbles, a Mandarin dragonet, explore life under the sea with their pals in "Splash and Bubbles," the newest series from PBS Kids. Co-produced by The Jim Henson Co., the animated series is designed to teach children aged 4-7 about marine life and the ocean and help them build social-emotional skills. The series features the voices of John Tartaglia (who also created the series), Leslie Carrara-Rudolph, Raymond Carr and Aymee Garcia.

Preschoolers get to hop on board the "Dinosaur Train" to learn about natural science, natural history and paleontology. Each half-hour episode of this series, produced in CGI-animated format by the Jim Henson Company, features Buddy, a preschool-aged Tyrannosaurus Rex, and his adoptive Pteranodon family traveling on a special train to meet all kinds of dinosaurs and explore the world inhabited by these amazing creatures. Also included are live-action segments hosted by paleontologist Scott Sampson.

This animated series from the makers of "Sesame Street" follows youngsters Esme and her best monster friend, Roy, on adventures in Monsterdale, where they are considered the best "monstersitters." In their colorful world, Esme and Roy use the power of play to help toddler monsters overcome big challenges and work through familiar situations, such as trying new foods and feeling frightened during thunderstorms. The series is targeted to viewers ages 4 to 6, who can learn how to manage emotions with simple mindfulness practices alongside Esme and Roy's charges.

Four fairytale friends go on magical adventures and become reading-powered superheroes. The characters live in Storybook Village, which is accessible through a panel that is represented by an invisible question mark. Preschool children follow the Super Readers as they jump into books that come to life.