Launched last month, the revamped channel brings together characters from the Cartoon Network, and its sister channels' Boomerang and Toonami, into one computer generated 3D world.
Targeting children aged four to nine, it is aimed at getting kids to tune in during the May half-term holidays.
The campaign includes in-school and leisure centre advertising as well as TV, press and outdoor.
Turner Broadcasting vice-president of Ad Sales Simon Cox said: "We are ensuring that Cartoon Network appeals to even more kids and that our channels are developed in line with what our consumers want."