What are the most popular and hard-to-get items for sale in the United States?

This may be a popular toy, electronic, game, gadget, etc.





They are frequently the most popular items that children are asking for Christmas or the latest technological craze.





NOTE: These popular items are often viewed as ';out-of-stock';, your limited as to how many you can buy at the store, these items sell above retail price and/or sold by a 3rd party because of a limited quantity by the supplier....





Thank you!What are the most popular and hard-to-get items for sale in the United States?
Stupid ZhuZhu pets hamsters. I got a set in early October, and since then I've been unable to find them in any stores.