- Hydro loves water, but loves waves even more, his grumbling sends tidal waves out to the shore. Beware if surfing’s your favorite hobby, he may rumble up a giant Tsunami
- No nurturing here - Poke, shake, tilt and roll them
- The more you mess with them the angrier they become, try to get them to full meltdown mode
- More than 40 different reactions and custom sounds
- Each grumblie has his own personality, sounds & design