Grumblies live secretly hidden from mankind. Short-tempered and mischievous, bands of Grumblies create supernatural chaos, such as earthquakes and volcanoes. Some have tried to separate and tame them, but be warned…..Messing with Grumblies could lead to an epic MELTDOWN! Push them too far, they RUMBLE & JUMP AROUND. Each of the Grumblies has unique sounds and personality. No nurturing here – POKE, SHAKE, TILT and ROLL for a mega-meltdown.