Create a 3D model of a healing item shaped like a simple, stylized "plus" sign. The shape should be made of smooth, blocky geometry — almost like voxel or pixel-art style but with slightly rounded edges for a modern cartoony look. The model should be a solid bright green color, similar to the classic health pickup look in arcade or retro-style games. It should appear as a floating collectible, casting a soft shadow beneath it, and optionally glowing slightly to give it a magical or important feel. Keep the proportions compact and symmetrical.

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