Place pears and their juice, kale, apple and agave in the jar of a high-powered blender. Blend until smooth, about 1 minute. Add the ice cubes and blend again until smooth.
Serve immediately or freeze for an icy treat later.
Place pears and their juice, kale, apples and agave in a large, high-powered blender. Blend until smooth, about 1 minute. Add ice cubes and blend again, about 1 additional minute.
Serve immediately or freeze for an icy treat later.