The Shimmering Orb
A soft and slightly squeezable ball about the size of two fists put together, it sparkles and shimmers like sunlight filtering through the surface of a pool.
When thrown at a surface, the ball will burst and a knee-high water elemental in the shape of an ocean creature emerges. This elemental will understand and attempt to perform any simple tasks given to it, and can reshape its form as needed. If the surface tension keeping it together is ever broken, the water elemental will pop and die leaving behind only an inert puddle.