1.) make a cube.
2.) make another cube and scale it so it's big.
3.) press Z to switch to wireframe
4.) go to the physics tab (F7 then physics (the ball bouncing off a plane?))
5.) select the little cube and click fluid
6.) select fluid (next to domain)
7.) select the big cube
8.) choose domain
-------optional---------
make a object in the big box (below the small cube)
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9.) select the big cube
10.) choose bake
11.) play the animation (alt + A)
12.) you may want to make a texture for the water and the other object(s)
13.) render the animation
hope i helped
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