Find out information about kaleidoscope. optical instrument that uses mirrors to produce changing symmetrical patterns. Invented by the Scottish physicist Sir David Brewster Brewster, Sir David,... Explanation of kaleidoscope
While books remains the most popular category for Amazon, it is quickly growing its other categories and diversifying into new areas. Here's the top 10 things people bought in February of 2015, ranked according to the number of purchasers in each category. 10. Cosmetics and fragrances.
Smart Home. The Amazon Echo is one of the most popular smart home devices on the market. (Photo: Amazon) Amazon Echo ($129.99, 28% off) The Echo is arguably the most popular smart home device on the market right now. And, of course, on Prime Day, you can get it for a songâ$130 song.