They are one of this year's most popular toys but wanting a Hatchimal and getting one are two different things.
There are reports that mums and dads have been struggling to find them in stock, while some shops have limited orders to just one per customer.
And on some websites they are being sold at almost £200, more than three times the regular retail value, £59.99.
The Toys R Us exclusive design, the Owlicorn Egg , and Tesco's exclusive, the Bearakeet , are proving particularly hard to get hold of.
Toymaker Spin Master says it has 'escalated production' following 'unprecedented demand' since the toy launched on October 7, and says shoppers should start to see more stock in stores this month.
A spokesperson for the company said: "The consumer response to Hatchimals has been extraordinary, exceeding all expectations.
"We recognize it may be difficult finding this in-demand toy. This is a special season and we don’t want anyone to be disappointed, nor do we support inflated prices from non-authorized resellers.
"With all of these factors in mind, we are accelerating production. Additional inventory will be hitting retail shelves in November.
"We anticipate this inventory will sell quickly as well, so we have increased production and a whole new batch of Hatchimals will be ready to hatch in early 2017."
A Toys R Us spokesperson said: "Demand for Hatchimals, in particular our exclusive Owlicorn has been significantly high and we are doing everything we can to source further quantities of stock from across the globe.
"Due to the fast turnaround, we are not currently selling Hatchimals through our online store, customers should visit or contact their local store for further information on stock availability at that store."
What are Hatchimals?
Hatchimals are magical creatures that live inside eggs. Who's inside? It's a surprise!
Each egg contains one of two interactive Hatchimals.
Kids are encouraged to love and care for theirs inside the egg and its eyes will light up as it makes cute sounds, telling them how it's feeling.
Once they've played with it enough, they'll see rainbow eyes which means it's time to hatch.
Hatchimals - recommended for children aged five and over - can't hatch on their own, but the child's touch encourages them to peck their way out of the egg.
They then get to raise their furry Hatchimal through three stages - from baby to toddler, to kid - and it sings 'Hatchy Birthday' each time it enters a new stage.
They can teach it to walk, talk, dance and play games and it will even repeat what your child says in its own voice.
Where can I get one?
Toys R Us
The Hatchimals can only be bought in store and the Toys R Us exclusive design - the Owlicorn Egg - is particularly hard to get your hands on.
Stocks are limited to one per customer and they are being sold in store only.
Tesco
Tesco sells five varieties of the Hatchimals priced slightly less than the RRP at £56.95.
Its range includes Tesco's exclusive Bearakeet , which comes in black and white.
Shoppers can do free click and collect, or standard delivery (two to five days), costs £3.
All are currently out of stock.
The Entertainer
A variety of new Hatchimals are for sale but none of them are currently in stock. More stock due late November.
Smyths
The retailer sells the Pengualas Teal Egg, the Draggles Purple Egg and the Draggles Green Egg.
They are available in store only with fresh stock scheduled to arrive between November 12 and 19.
Argos
Argos sells four varieties of the egg at £59.99 each. Currently out of stock. Keep checking the website for fresh stock.
Sainsbury's
Sainsbury's is selling the Draggles and the Pengualas in store only.
There is no option to check stock availability online, so the best way for customers to check is to either pop in store or call a store and ask for the colleagues to find it on the system.
If they don’t stock the item, they are able to locate other nearby stores on the system who do have stock and if necessary call the other store and request for them to hold the stock.
A spokesman for Sainsbury's said it does have some in stock but they are 'selling like hot cakes as they are in large demand'.
He said: "We currently have all stock in stores and will be ordering more for replenishment."
How much are they?
They retail at £59.99 and while most stores are selling them at the recommended retail price, Tesco is selling them for £56.95, while on Amazon they are selling from around £80, with some eBay sellers asking up to £200.
