Rock is a Material in Where's My Water? first appearing in Meet Swampy.
- Rock is a material that is similar to Dirt but cannot be dug. It can hold and guide Fluids.
- Rock can be blown up by any form of explosion.
- Rock can be destroyed by the Mystery Duck.
- Aside from existing when a level is started, Rock can be formed when Ooze comes into contact with Algae.