Starting today, everyone’s Noggin is going to get a whole lot bigger. The commercial-free cable network aimed at preschoolers with shows such as “Jack’s Big Music Show,” “Oobi” and “The Upside Down ...

Viacom networks The N and Noggin--targeting teens and preschoolers, respectively--will each become a stand-alone 24-hour network as of Dec. 31. The networks have been sharing a single channel space, ...