In this four-part science tutorial, learn how to make a model of a hand that works like a real hand: with tendons that move the fingers. This is a great tool to teach kids the body's inner workings. Part 1 includes an introduction and parts 2-4 include the step-by-step instructions to contruct this learning tool.

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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