Joining the ranks of Tickle-Me Elmo, Cabbage Patch Kids, and the Teenage Mutant Ninja Turtles ... behold, the Zhu Zhu Pets. These robotic rodents are expected to be the most in-demand toy for the 2009 holiday shopping season.

The five battery-operated hamsters respond to touch with 40 different sounds, and can also run around when set in "explore" mode. It's all the fun of having a pet without the messy clean-up duty.

Parents, you have Cepia LLC, a small company in St. Louis, to thank for these critters. The firm is hoping to ship between 4 million and 5 million pets by the end of the year (banking $300 million to $400 million in sales), but admits they cannot keep up with the demand. Cepia has grand plans, however, for the next part of the Zhu Zhu universe, hoping to roll out hedgehogs, rabbits, and other furry robot friends in the next year or so.

Toys R Us bought FAO Schwarz in May and is now ready to do something interesting with it.

It's a pretty bold move for a tough retail market. Toys R Us is opening FAO Schwarz boutiques in some of its stores. It's also relaunching the upscale toy seller's website, FAO.com. A year ago, this would have been suicide, but now, it might work out. With retailers in every sector fighting for an edge, this move may beef up the Toys R Us in-store experience, with the online play helping it reach higher-spending consumers that may not have access to an FAO brick-and-mortar spot.

In the wake of last week's public offering of Dollar General, more IPOs are expected to be coming down the pipeline as private equity firms seek a monetary return on investments made during the boom years. Speculation is that Toys "R" Us and Dunkin' Donuts could be next.

Toys "R" Us Inc. is owned by Bain Capital, KKR, and Vornado Realty Trust (NYSE: VNO). The world's leading dedicated toy and baby products retailer was a public company from 1978 until its acquisition by the private equity consortium in July 2005 for $6.6 billion. It has more than 1,500 stores in 33 countries, and its businesses include Babies "R" Us, eToys.com, and FAO Schwarz, the latter two acquired earlier this year. Main competitors include privately owned KB Toys, as well as big-box retailers Target Corp. (NYSE: TGT) and Wal-Mart Stores Inc. (NYSE: WMT).

The market has made a nice rebound over the past few months, and one question is on every investor's lips: Can it continue?

To get an answer, it might not be a bad idea to look at what the private equity firms are planning. Remember when The Blackstone Group (NYSE: BX) decided to cash out with an IPO and it marked the exact top of the private equity boom? Take a look at how that stock has performed since then.

Well, now The Financial Times reports that "Kohlberg Kravis Roberts, the world's biggest buy-out group, is preparing up to six companies for initial public offerings worth billions of dollars, including Toys 'R Us, as it sells some of its most valuable groups back to the stock market."

This morning, Toys R Us Inc. announced that it purchased high-end toy retailer FAO Schwarz. FAO has struggled mightily for years, thanks to harsh competition from discount toy stores.

Toys R Us CEO Jerry Storch stated, "We will work tirelessly to preserve the distinctiveness and integrity of the FAO Schwarz stores and brand as we grow the business and, indeed, take the brand to even greater heights."

I have always disliked the moniker 'Black Friday.' Explaining that 'Black Friday' refers to the day that retailers go from losing money to making it strikes me as awkward -- particularly when my first instinct on hearing that phrase is to think of something very bad happening on a Friday.

Which is why today's deadly events combining shopping for the holidays and death seem so strange and sad. This morning, a Wal-Mart Stores (NYSE: WMT) clerk at a store in Valley Stream, Long Island was trampled to death by a crowd of 2,000 people eager to grab bargains. "The impatient crowd knocked the man to the ground as he opened the doors, leaving a metal portion of the frame crumpled like an accordion," according to AP. If store cameras can identify who trampled the store clerk, criminal charges could be brought against them.

Later in the day, two people were shot dead at a Toys 'R' Us in Southern California. The Riverside Country sheriff's department reported an argument between two teenagers preceded the shooting. A third person, a male, apparently pulled out a gun, according to AP.

This post is part of a series on some of the most memorable companies that have disappeared.

Back in the heady dot-com days of 1999, any parent who didn't want to brave the holiday season parking lots knew what to do: Get online and buy those Christmas presents at eToys.com. Unlike Toys-R-Us, which had recently gone online itself, eToys seemed to know what it was doing. It offered a vast array of toys at reasonable prices, and it got them to you on time as promised.

But by March 2001, you were back to the Toys-R-Us option -- by then allied with Amazon.com, and doing online retailing the right way. In the end, eToys proved no more durable than the Furby -- much sought-after, priced up by speculators and hype, only to ultimately end up in the backyard, broken and ignored.

eToys went up fast and crashed hard, (not unlike a pogo stick), and in many ways it remains a textbook example of the excesses and "irrational exuberance" of the dot-com era.

Back in March 2005, a group of marquee private equity firms -- Kohlberg Kravis Roberts & Co. and Bain Capital -- purchased Toys "R'' Us for $6.6 billion. It was certainly a leap-of-faith. After all, the toy retailer had been under assault from Net upstarts as well as mega retailers like Wal-Mart Stores, Inc. (NYSE:WMT).

Well, the environment got even tougher since then. As a result, Toys "R" Us hired Gerald Storch, a top-flight executive from Target Corp. (NYSE:TGT), to run the ailing toy retailer (he came on board in February).

And, he seems to be getting some traction. In fact, according to a piece in Bloomberg.com, the bonds of Toys "R" Us have been rallying lately. Keep in mind that during the summer, bond investors were pricing the bonds as if they would default.

What has Storch done? Well, he has cut 3,000 jobs, closed down a variety of stores and renovated other stores. Perhaps his best move was offering exclusive products, such as the Nitro Notebook computer.

But, the fact remains that the company has $6.72 billion in debt and the competition is not getting any easier.

However, this is high profile deal and it would be an embarrassment if things went awry. In other words, this appears to be an early test of the riskiness of the private equity world.

Tom Taulli is the author of various books, including the Complete M&A Handbook and operates DealProfiles.com.