Animating Blocks

Doing the blocks tutorial. where you sketch a crane with 2hydraulic pistons.

You can animate the sketched crane, but only when you are in sketchedit mode.

Assuming that you would build solids from the animated blockswithin the sketches and somehow animate them, just can't figure outhow? Otherwise what's the purpose of having animated (movable)sketches?SolidworksGeneral