This may look like an average retro calculator, but it is actually an iPhone 4 case with a super realistic looking decal. This retro calculator case consists of a clear hard plastic case plus the decal and retails for $19.50 on etsy.
Great for an April Fool’s day prank or an anytime prank. I bet it would even fool the nerdiest of math nerds. It looks very convincing. Except for the camera hole.