Oobi, Uma, and Grampu pretend to be wild animals. Oobi pretends to be a puppy by barking, sniffing, and licking Grampu.

Oobi and Uma visit the playground, where Uma learns how to be careful on a swing.

Noggin, Nickelodeon’s commercial-free network for preschoolers, is enriching its content with a morning lineup of new shows that begins today: gentle “Miffy and Friends” (at 7:30 a.m.), an offbeat ...