Wave machines are a lot of fun to play around with. They could cost a lot of money, especially the ones that are motorized. This Liquid Penguin Paperweight is a cute little toy that produces cool wave motion as you sway it from side to side. The little penguins ride the small waves that you create.
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Liquid Penguin Paperweight with Wave Motion 🐧 Gadgetify
These cute paperweights are pretty cheap too. The above video shows it in action.
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