Here are various tricks which are possible with "scratch holography." To make one of these holograms, all you really need is a plastic CD case and a couple of thumb tacks pushed through a stick.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.
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