The Levitating Pen can be positioned in its holder which is magnetized and can be kept floating in that position. You need to give the pen a simple twist, which makes it spin for a good 20 seconds, allowing you to interact with it.
With the Rolling World Clock, you can easily get the timezone you need with a simple one-handed movement. You can turn the clock till the city whose time you need to check turns up, allowing the watch hand to adjust to the correct timezone automatically.
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